Unit 4 Chinese folk art Integration 课件 (共85张PPT)译林版英语七年级下册

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Unit 4 Chinese folk art Integration 课件 (共85张PPT)译林版英语七年级下册

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(共85张PPT)
Integration
Unit 4 Chinese folk art
A Sandy and her friends are visiting a Chinese folk art museum. They are seeing a Huishan clay art exhibition. Read what the tour guide says. Then answer the questions below.
Huishan clay art
Huishan clay figures/'f ɡ (r)z/ from Wuxi are made from a kind of black clay. They have strong local colour.
There are two types of Huishan clay figures. Look at those on your left. They are made in moulds /m ldz/, in the shape of cute kids and animals. They have simple shapes /'s mpl/ and bright colours, and express wishes for good luck and a happy life.
~~~~~~~~~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~~~~~~~~~~~~~~~
长难句分析:这是一个主谓宾结构的简单句,其中主语是 They,谓语部分是由and连接的两个并列谓语have和express。句尾介词短语for good luck and a happy life “对于好运和幸福生活”作wishes 的后置定语。
The figures on your right are made by hand. They usually show popular scenes from traditional operas /' pr z/.
Now you can have a close look at them and enjoy their beauty!
1 What are Huishan clay figures made from
2 Which type of Huishan clay figures do you like better Why
A kind of black clay.
I like the ones on the left. Because they are cute and their colours are bright.
B Sandy and her friends are looking at Chinese kites in the museum. The tour guide is telling them about the kites. Listen to what the tour guide says and complete the notes below.
All about kites
●Materials for making kites
·Wood, bamboo, (1) _________ and silk.
●Shapes of kites
·Early kites often looked like (2) _________.
· Modern kites come in many cool shapes, such as (3) _________ , planes and famous people from history.
●Flying kites
· It is a very popular outdoor /'a td (r)/ activity today.
· Sunny, windy days in spring are good for flying kites.
· There is a (4) _________ in Weifang every April.
从教材习题B 中学中考解题策略
标题导引法
①分析文段中的三个标题,聚焦听力材料范围;
②结合所填词汇的前后并列词,进一步定位目标词汇;
③认真听材料,填写正确词汇。
C Mr Wu is asking his students how much they know about Chinese folk art. Work in pairs and talk about the topic. Use the conversation below as a model.
Mr Wu: How much do you know about Chinese folk art, students
Millie: Chinese folk art comes from work ing people. It shows things about ordinary /' dnri/ people’s lives, and it’s usually made from everyday /'evride / materials.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
长难句分析:这是一个由 and 连接的并列复合句。第一个分句是主动语态:主语是It, 谓语动词是shows,介词短语 about ordinary people’s lives “关于普通人的生活”作名词things 的后置定语。第二个分句中的动词短语made from everyday materials表示“由日常材料制成”。
Sandy: I think it’s creative/kri'e t v/ to make wonderful pieces of art. Sometimes the craftspeople/'krɑ ftspi pl/ make their art without designing beforehand. That’s amazing!
Daniel: I respect/r 'spekt/ the spirit /'sp r t/ of the craftspeople. A good work of art usually takes a long time to make. It must take a lot of hard work and practice.
~~~
team spirit 团队精神
in spirit 在精神上
~~~
I think... 意为“我认为......”可以用来表达观点。
否定句为: I don’t think... 意为“我认为...... 不......”。
思考1:We know Chinese folk art is creative and popular all over the world. How will it be in the future
In the future, Chinese folk art will be more creative and popular around the world. It may also be shared in new ways, like online platforms and digital media(数字媒体). More people can learn about and appreciate it. People of all ages, especially students like us, will learn the traditional skills well. It will bring joy and happiness to many people.
D Sunshine Middle School is having its Folk Art Week. Mr Wu asked each student in Class 1,Grade 7 to introduce a Chinese handicraft.
D1 Think of a Chinese handicraft /'h ndikrɑ ft/ you like or one from your hometown and complete the notes below. You can also add your own ideas.
Name of the handicraft ___________________________
Basic /'be s k/ information about the handicraft
·What do people use it for
_________________________________________________
_________________________________________________
Paper-cutting
People use it in some special events to decorate and express wishes.
·Where does it come from
___________________________________________________
·How long is its history
___________________________________________________
Something special about the handicraft
______________________________________________________________________________________________________
It comes from Shaanxi Province.
Paper-cutting has a history of over 1,500 years.
Each paper-cut is carefully planned and designed. It’s a way to express creativity and share stories.
Cultural/'k lt r l/ value /'v lju / of the handicraft
________________________________________________________________________________________________________________________________________________________________________________________________________________Other ideas ___________________________
Papercutting is not just an art form but also a symbol of good luck and happiness. During festivals like the Spring Festival, paper-cuts are used to decorate homes. Learning paper-cutting is fun and interesting.
D2 Read Sandy’s article about the Huizhou inkstick.
Title Huizhou inkstick /' kst k/
The Huizhou inkstick is among / 'm / the best of its kind. It gets its name from the old Huizhou area, largely /'lɑ d li/ in today’s Anhui Province. The Huizhou inkstick has a history of over 1,000 years and was very popular with ancient Chinese writers and painters/'pe nt (r)z/.
Basic
information
The Huizhou inkstick uses pine /pa n/ wood as its main/me n/ material. lt is very difficult to make. Usually the making of such an inkstick takes over a year. The Huizhou inkstick is beautiful, and some people say the inkstick itself/ t'self/ is a work of art.
What is
special
about it
~~~~~~~~~~~~~~~~
the making of such an inkstick 是动名词短语作主语,看作一个整体,谓语用单数。
The Huizhou inkstick is famous for its great quality/'kw l ti/ and design. As a fine example of traditional Chinese folk art, the Huizhou inkstick is an important part of Chinese culture.
The cultural
value of it
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
长难句分析:这是一个简单句, 主系表结构。主语是 The Huizhou inkstick ,系动词是 is 。句中 is famous for 表示“因...... 而著名”。想一想下面这个句子该怎么表达呢?中国因长城而著名。
思考2:What do you think of the value of Huizhou inkstick
It’s helpful for learning and practicing traditional Chinese writing and painting. The Huizhou inkstick with high quality can express the beauty of the artworks.
Write an article about a Chinese handicraft based on the information in Part D1. Use Sandy’s article as a model.
Useful expressions
...is a/an ...
People like it because ...
... has a history of ...
It gets its name from ...
... is easy/difficult to make./It takes a long time to make.
Some people say ... is a work of art.
... is famous for ...
... is an important part of Chinese culture.
1 simple /'s mpl/ adj. 简单的;简朴的(教材P50)
(观察)· There is no simple answer to this question.
这个问题没有简单的答案。
· This machine is very simple to use. 这台机器操作非常简单。
· To order, simply click here. 如需订购,只需点击此处。
· That would be simply wonderful! 那简直太棒了!
探究一 核心单词
(一)高频词
· The rooms are simply furnished. 房间陈设简朴。
· It is simple/easy to work out the problems.
解决这些问题很容易。
归纳拓展
simple adj. 简单的;简朴的,可作表语或定语,可构成短语:a simple solution 简单的解决办法
simply adv. 仅仅,只;简直;简朴地,修饰形容词或动词。
辨析: simple 与easy
simple simple 侧重于事物本身的简单性,而不考虑
是否容易理解和接受。simple 的反义词是
complicated(复杂的)。
easy easy 则侧重于事物的易做性和不费力性,强调的是做事情的轻松程度。easy 的反义词是difficult(困难的)。
一语辨异
It’s not easy to solve this simple problem.
解决这个简单的问题并不容易。
~~~ ~~~~
学会运用1: Will you feel bored if you do the s job over and over again
学会运用2: You will get used to it. It’s _________ (simple) a question of time.
imple
simply
学会运用3: Tom tried out for the school basketball team _________ because he was interested in the basketball.
A. hardly B. nearly C. simply D. specially
C
【点拨】句意:汤姆参加了学校篮球队的选拔,仅仅是因为他对篮球感兴趣。hardly 几乎不;nearly 差不多,几乎;simply 仅仅,只;specially 特意。根据“because he was interested in basketball”可知,此处表示仅仅是因为他对篮球感兴趣。故选C。
学会运用4: 你可以享受所有的水上运动,或者只是躺在沙滩上。
You can enjoy all the water sports, or ________ ________ on the beach.
simply lie
2 everyday /'evride / adj. 日常的,每天的(教材P51)
(观察)· It’s very important to keep safe in everyday life.
在日常生活中保持安全是非常重要的。
· My father goes to work on foot every day.
我爸爸每天步行去上班。
辨析: everyday 与every day
everyday 作形容词,意为“日常的,每天的”,用作定语,可构成短语:everyday clothes 平常衣服;everyday life 日常生活;everyday objects 日常物品。
every day 意为“每一天,每天”,作时间状语。
一语辨异
We speak everyday English every day.
我们每天讲日常英语。
~~~~~ ~~~~~~
学会运用5: The old man buys some ______ things in the supermarket almost ______.
A. everyday; everyday B. every day; everyday
C. everyday; every day D. every day; every day
学会运用6: 你必须每天刷牙。
You must ________________________________.
C
brush your teeth every day
3 creative /kri'e t v/ adj. 有创造力的;创造性的
(观察)· She’s very creative ─ she writes poetry and paints. 她极富创造力,既赋诗又作画。
· Do you have any ideas You’re the creative one.
你有何高见?你是有创造力的人。
· Genet teaches you to think creatively.
吉尼特教你创造性地思考。
· Joining the clubs is a good way to develop our creativity.
参加俱乐部是培养我们创造力的一种好方法。
· We should care for the wild animals and create a friendly environment for them. 我们应该爱护野生动物,为它们创造一个友好的环境。
归纳拓展
creative adj. 有创造力的;创造性的,可作表语或定语。a creative man 一个有创造力的人;
creative thinking 创造性思维;creative writing 创意写作。
creatively adv. 创造性地,有创造力地,修饰动词或形容词。
creativity n. 创造;创造力;创意。artistic creativity艺术创造力
create v. 创造;创建
学会运用7: To _________ (creative) a new picture, that painter has stayed in his studio for nearly a week.
学会运用8: They have come up with some _____________ (create) ideas to make the event fun and memorable.
学会运用9: —Tom is a _______ boy in our class.
—That’s true. His mind is full of ideas every day.
A. create B. creative C. creativity D. creatively
create
creative
B
学会运用10: 书可以给孩子们有用的信息和创造性的想法。
Books can give children useful information and ___________ ___________.
creative ideas
4 respect /r 'spekt/ vt. 尊敬,尊重(教材P51)
(观察)· She promised to respect our wishes.
她保证尊重我们的愿望。
· I respect you for your honesty.
我因为你的诚实而尊重你。
· He has no respect for her feelings.
他根本不尊重她的感受。
归纳拓展
respect vt. 尊敬,尊重,常构成短语:respect oneself 自重;respect yourself 尊重你自己。
respect n. 尊敬;重视;方面。用作名词时,
常构成短语:respect for 尊重……;with respect to sth. 关于;in respect that 由于,鉴于;in this respect 在这方面。
学会运用11: As a student, we must r our parents and teachers.
学会运用12:老师告诉孩子们要尊重不同的文化。
The teachers tell the children to __________ __________ __________ .
espect
respect
different cultures
5 basic /'be s k/ adj. 基本的;初级的(教材P51)
(观察)· Their knowledge is very basic.
他们所掌握的知识是相当初级的。
· The basic idea is that we all meet up in London.
基本设想是我们都会到伦敦会合。
· All cheeses are made in basically the same way.
所有奶酪的做法基本上相同。
· The lamp has a heavy base. 这盏灯的底座很沉。
归纳拓展
basic adj. 基本的;初级的,可作表语或定语,可构成短语:basic knowledge 基础知识;basic skills 基本技能;basic education 基础教育;basic ideas 基本观念。
basically adv. 大体上,基本上,修饰动词或形容词。
base n. 根基,底座;总部;基地;基础
学会运用13: _________ (base) education is very important to every person.
学会运用14: Cooking is one of the b living skills that students have to learn.
学会运用15: 我在学校学习英语语法的基本规则。
I am studying ________ ________ ________ of English grammar at school.
Basic
asic
the basic rules
6 cultural /'k lt r l/ adj. 文化的(教材P51)
(观察)· Beijing opera is China’s national opera and it is full of Chinese cultural traditions.
京剧是中国的国剧,它蕴含着中国的文化传统。
· In our culture, it is rude to ask someone how much he earns. 在我们的文化里, 问别人的收入是不礼貌的。
归纳拓展
cultural adj. 文化的,常作定语。
a cultural event 文化活动;cultural traditions 文化传统;cultural differences 文化差异;cultural education 文化教育。
culture n. 文化;文明。
national culture 民族文化;Western culture 西方文化;traditional culture 传统文化;folk culture 民俗文化。
学会运用16: Different _________ (culture) have their unique customs and traditions.
学会运用17: As a part of Chinese c , tea is widely used in different international communications.
学会运用18: 你爸爸多久看一次这个文化节目?
How often does your father watch _________________
cultures
ulture
this cultural show
7 value /'v lju / n. 价值(教材P51)
(观察)· The value of education cannot be measured in monetary terms. 教育的价值无法用金钱衡量。
· The house now has a market value of one million pounds.
这栋房子目前的市场价值为100 万英镑。
· I really value him as a friend. 我真的把他视为朋友。
· The teacher gave us some very valuable advice on how to improve our study habits. 老师给了我们一些关于如何改进学习习惯的宝贵建议。
归纳拓展
value n. 价值,通常作不可数名词,常构成短语:be of great value 具有很大的价值。
value v. 重视,珍视;给……估价
valuable adj. 很值钱的,贵重的;很有用的,宝贵的,用作定语或表语,常构成短语:valuable experience 宝贵的经验;valuable information 有价值的信息。
学会运用19: Let’s raise our glasses to our bright future and _________ (value) friendships.
学会运用20: From now on, we should v time and do something meaningful.
学会运用21: 这本书将对他的研究有很大价值。
This book will be of _________ _________ to his study.
valuable
alue
great value
8 among / 'm / prep. 在……中,……之一(教材P52)
(观察)· Among all the animals, I like dolphins best.
在所有的动物中,我最喜欢海豚。
· He is good at writing and his novels are popular among teenagers. 他擅长写作,他的小说在青少年中很受欢迎。
· Children between the ages of 5 and 16 must attend school. 5 到16 岁的孩子必须上学。
辨析: among 与between
among 作为介词,意思是“在……中”、“周围是”、“在(其)中”、“……之一”、“在三者或以上中(分配或选择)”, 主要用于三者或三者以上的之间或之一。among 有时相当于one of,即“……当中的一个”。among 还可引出形容词最高级的比较范围。
between “在……之间”,一般指两者之间,其宾语可以是有具体数目的人或物,也可以是用and 连接的两个具体的人或物。
学会运用22: —Which man is your father
—The tallest one _______ all the men.
A. between B. on
C. among D. at
C
学会运用23: The new library is a great place for students to study. It’s located _______ the school, _______ the main building and the sports field.
A. in; between B. on; between
C. at; among D. to; across from
学会运用24: 在所有科目中,我最喜欢英语。
______________________, I like English best.
A
Among all the subjects
9 largely /'lɑ d li/ adv. 主要地,在很大程度上(教材P52)
(观察)· The state of Nevada is largely desert.
内华达州大部分是沙漠。
· His success is largely due to his hard work.
他的成功很大程度上是因为他的努力。
· They have a large family to feed. 他们要养活一大家人。
归纳拓展
largely adv. 主要地,在很大程度上,修饰动词或形容词。
large adj. 大的;大量的;大型号的;广泛的
a large number of people 很多人;
several large sums of money 几笔巨款
学会运用25: Inner Mongolia is l grassland.
学会运用26: George was thirsty and he drank two _________ (largely) bottles of water quickly.
学会运用27: 刚才我看见一个小个子男人跑进了一所大房子。
I saw a small man run into __________ __________ __________ just now.
argely
large
a large
house
10 painter /'pe nt (r)/ n. 画家(教材P52)
(观察)· My father is a famous painter in our country.
我父亲是我国著名的画家。
· He works as a painter and decorator.
他的职业是油漆匠和装潢师傅。
· The paint is starting to peel off. 油漆开始起皮剥落了。
· He paints the walls blue, a calm and peaceful colour.
他把墙漆成蓝色,一种平静祥和的颜色。
· My younger brother can’t make a living by selling his paintings.
我弟弟不能靠卖画谋生。
归纳拓展
painter n. 画家,是可数名词,作主语或宾语。“动词+er/or 变职业名词”,类似的单词还有:work—worker, teach—teacher, wait—waiter, run—runner, farm—farmer, act—actor 等。
归纳拓展
painter n. 油漆匠,是可数名词。
paint n. 油漆;油漆涂层,作不可数名词。white paint白漆;paint factory 油漆厂。绘画颜料[pl.]。
paint v. 在……上刷油漆;用颜料画;涂,染;把……描绘成,paint... blue/black 把……漆成蓝色/ 黑色。
painting n. 油画;作画,绘画;涂漆,刷油漆
cave paintings 洞穴壁画
学会运用28: The great artist died at the age of 92, leaving behind thousands of p .
学会运用29: I’m afraid I don’t have any artistic abilities. I just enjoy _________ (paint).
学会运用30: Mrs Li is a __________ in our school. She _________ English. (teach)
aintings
painting
teacher
teaches
学会运用31: We are organizing a _______ competition for the children in hospital.
A. paint B. painters C. painting D. paints
学会运用32:他是一名著名画家。他喜欢把墙涂成蓝色和绿色。他的绘画被很多人收藏。
He is a famous _________. He likes to ________ the walls blue and green. His ______________ are collected by many people.
C
painter paint
paintings
11 itself / t'self/ pron. 它本身(教材P52)
(观察)·The cat was washing itself. 猫在清洗自己。
· The dog scratched itself behind the ear. 狗用爪子挠挠耳后。
· I wrote a message to myself. 我给自己写了个便条。
· We’d like to see it for ourselves. 我们想亲眼看看它。
· She must be very proud of herself. 她一定非常自豪。
·He is teaching himself English. 他正在自学英语。
归纳拓展
itself pron. 它本身,是反身代词,可作主语、表语、宾语和同位语等。
反身代词由oneself 根据所指的人称、性别、单复数等进行变化,有myself, himself, herself, yourself, itself, ourselves, yourselves, themselves。
反身代词经常在enjoy, teach, hurt, buy, introduce, seat, dress, express, amuse, behave 等动词和by, for, to, of 等介词后作宾语。
学会运用33: The box __________ (it) is not so heavy.
学会运用34:— You’d better keep the secret to ________ , boys.
—OK, Mrs Lee. But can you also keep it for _______
A. yourselves; ourselves B. yourselves; us
C. you; ourselves D. yourself; us
学会运用35:我们已经长大了,可以照顾自己了。
We are old enough to _______ ______ ______ __________.
itself
B
take care of ourselves
12 quality /'kw l ti/ n. 品质,质量;人品,素质(教材P52)
(观察)· The quality of these products is really good.
这些产品的质量真的好。
· The Winter Olympics will show the excellent qualities of our local people.
冬奥会将展示我们当地人民的优秀品质。
归纳拓展
quality n. 品质,质量,既可作可数名词,又可作不可数名词;人品,素质,是可数名词,复数形式为qualities。常构成短语:the quality of life 生活质量;the quality of teaching 教学质量。
学会运用36: The successful designer uses his creative ideas to improve the q of life.
学会运用37: Lily usually compares (比较) the ___________ (quality) before she buys things.
学会运用38: 机器人在使用前,其质量必须达到标准。
________ ________ ________ the robot must be up to standard before it is used.
uality
qualities
The quality of
13 outdoor /'a td (r)/ adj. 室外的,户外的(教材P50)
(观察)· If you enjoy outdoor activities, this is the trip for you. 如果你喜欢户外活动,那么这个旅行适合你。
·You may join an outdoor club. 你可以加入户外俱乐部。
· They often do outdoor sports. 他们经常做室外运动。
· Mr Freud is an indoor artist. 弗洛伊德先生是位室内艺术家。
(二)拓展词
归纳拓展
outdoor adj. 室外的,户外的。用作定语。可构成短语:outdoor activities 户外活动,室外活动;outdoor temperature 室外温度;outdoor sports 户外运动;outdoor life 户外生活。
indoor adj. (在)室内的;在户内进行的。用作定语。可构成短语:indoor temperature 室内温度;室温;an indoor swimming pool 室内游泳池;indoor work室内工作;an indoor garden 室内花园。
学会运用39: I enjoy o activities such as running and hiking. They really make me relaxed.
学会运用40: Making paper flowers is my favourite i activity.
学会运用41: 现在是户外活动的时间了。
It’s time for __________ __________.
utdoor
ndoor
outdoor activities
学会运用42: 外面雨下得很大,但是我们可以在室内体育馆进行篮球赛。
It is raining heavily outside, but we can have the basketball match _________ _________ _________ _________.
in the indoor gym
14 main /me n/ adj. 主要的,最重要的(教材P52)
(观察)· The main reason I live in Spain is the weather.
我居住在西班牙的主要原因是天气。
· What do you consider to be the main problem
你认为最主要的问题是什么?
· I don’t go out much, mainly because I have to look after the kids.
我不大出去, 主要是因为我得照看孩子们。
归纳拓展
main adj. 主要的,最重要的,常作定语,可构成短语:main reasons 主要原因;main idea 主要意思,主旨。
mainly adv. 主要地;大多,修饰动词或形容词,可构成短语:mainly about 主要是关于;mainly because主要是因为。
学会运用43: Skimming helps you to catch the m idea of the passage.
学会运用44: This passage ____________ (main) tells us how to use the computer.
学会运用45: 他主要的兴趣是读书和弹钢琴。
___________ ___________ ___________ are reading and playing the piano.
ain
mainly
His main interests
1 by hand 手工 (教材P50)
(观察)· Farm workers milked cows by hand.
农场工人们手工给奶牛挤奶。
· I have to wash my clothes by hand.我不得不手洗我的衣服。
· Could you give me a hand moving this cupboard, please 请问你能帮我搬一下这个橱柜吗?
· He thinks we should never shake hands again.
他认为我们不应该再握手了。
探究二 核心短语
归纳拓展
单词hand 作名词时的常用短语:
at hand 手头;手边 by hand 手工
give/lend sb. a hand 帮某人一把
hand in hand 手拉手 in hand 在手中;在掌握中
on hand 现有的(尤指帮助)
shake hands(with sb.)(与某人)握手
学会运用1: —How was the cake
—It was nice. And my mom made it ________ ________.
学会运用2:—Could you give me ________ I can’t put up the poster by myself.
—No problem.
A. a hand B. a look
C. a job D. hands
by hand
A
学会运用3: 她和她的老朋友手拉手爬了上去。
________ ________ ________ , she climbed up with her old friend.
Hand in hand
2 be popular with 受……欢迎(教材P52)
(观察)· Miss Yang is popular with the students.
杨老师很受学生的欢迎。
· This could be very popular among girls.
这在女孩子中非常流行。
· What kinds of candies are popular in your country
你们国家流行哪种糖果?
归纳拓展
be popular with受……欢迎,指某人或某物在某群体中受到普遍喜爱或欢迎。
be popular among 在……中受欢迎,指某物或某人在某个群体或环境中非常受欢迎或流行。
be popular in 在……流行,指某物或某事在某个地区或文化中非常受欢迎或流行。
学会运用4: Shopping online is so convenient that it is popular ________ young people.
A. beside B. among C. to D. between
学会运用5: 她很受年轻人和老年人的欢迎,因为她很友好。
She ________ ________ _____________ the young and the old because she is very friendly.
B
is popular with/among
It is very difficult to make. 它(徽墨)很难制作。(教材P52)
探究三 核心句式
(分析结构)此句为主系表结构,it 是形式上的主语,is 为系动词,very difficult 作表语,动词不定式to make是句子的真正主语。句型“It is+ 形容词+to do sth.”表示“做某事是……”,此句的否定形式要在is 后加not。
~~~~~~ ~~~~~~~~
~~~~~~~~~~~~~~~
~~~~~~ ~~~~~~~~~~~~~
· It is necessary to learn English well.
学好英语是有必要的。
· It’s dangerous to walk through the forest alone.
独自穿过森林是危险的。
· It is not meaningful to play computer games all day.
整天玩电脑游戏没有意义。
学会运用1: It is wonderful _________ (join) in the contest.
学会运用2: It is ______________ (importance) to finish the task in time.
学会运用3: 学习如何修理电视机是有用的。
It is ________ ________ ________ how to repair TV sets.
to join
【点拨】语法分析法。
important
useful to learn

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