资源简介

(共11张PPT)
重点词汇讲解
Unit4 Weather and our lives
教师______
学校______
重点词汇
search v. 搜索；搜寻；搜查；查找
They searched the area for hours but couldn't find the missing dog.
他们搜 索该地区数小时但未能找到失踪的狗。
【提示】search与 search for的区别：
search通常指搜索的行为或过程，它强调的是动作本身，后面可以直接跟地点等，表示在其中进行搜索。search for则明确表示寻找某个特定的目标或对象，侧重于搜索的目的和意图，后面通常跟要寻找的人或事物。也可以将search与search for的用法合并在一个句子中，既强调搜查的地点，又表达寻找的对象。如：
The police searched the building.
警方搜查了这座建筑。(这句话说明警方在建筑里进行了搜索，但未具体说明他们要找的是什么。)
The police searched for the suspect.
警方搜寻了嫌疑人。(这句话说明警方正在寻找特定的人，即嫌疑人。)
I searched my bag for my keys.
我翻了我的包找钥匙。(这句话明确了在找什么—钥匙，以及在哪里找—包里。)
drop v. 降低；减少
The temperature dropped to zero during the night.
气温在夜间降到了零度。
At last the wind droppe d. 风势终于减弱了。
【提示】drop常用于表示“(意外地)落下，掉下，使落下”之意。
如：
He dropped his mobile phone in the pool and it broke.
他不小心把手机掉进了游泳池，手机坏了。
The balloon dropped to the ground when the air leaked out.
当气球漏气时， 它落到了地上。
【联想】rise v.(数量)增加，增长，提高
wind n.风
The wind is blowing from the south.刮的是南风。
【联想】windy adj.多风的；风大的
a windy day 大风天
cloud n.云；云朵
The Sun went behind a cloud.太阳躲在了一朵云的后面。
【联想】cloudy adj.被云遮住的；阴云密布的；多云的
a grey,cloudy day 灰暗多云的一天
fog n. 雾
The fog finally disappeared.雾终于散了。
【联想】foggy adj. 有雾的
Word study
The children are looking forward to the picnic next Saturday.
孩子们期待着下周六的野餐。
【提示】picnic也可作动词，其过去式和过去分词均为picnicked, 表示“野 餐”,相当于have a picnic。如 ：
They picnicked on the grass near the lake.
他们在湖边的草地上野餐。
have a picnic 野餐
【提示】have在这里是“进行”之意。“去野餐”通常说成 go for a picnic。如：
Let's have a picnic by the lake this weekend.
让我们这个周末在湖边野餐吧。
Let's go for a picnic this weekend at the park.
这周末我们去公园野餐吧。
picnic n. 野餐
hate v. 讨厌；憎恶
【提示】hate后常跟名词、动名词或动词不定式，表示“讨厌某事或讨厌做某事”。
I hate Monday mornings.我讨厌星期一早上。
She hates making mistakes.她讨厌出错。
He hated to be away from his family.他很不愿意离开家。
【联想】like v.喜欢；喜爱 love v.喜欢；爱
record n. 纪录；记录 v. 记 录
She holds the world record for the 100 metres. 她保持着100米的世界纪录 。(作名词，意为“纪录”)
Last summer was the wettest on record in this city.这个城市去年夏天的降雨量是有记录以来最大的。(作名词，意为“记录；记载”)
You should record all your expenses during your trip.你应该记下你旅行中的所有开支。(作动词，意为“记录；做记录”)
break a record 打破纪录
She broke a record by running the marathon in under 2 hours and 30 minutes. 她以不到2小时30分钟的成绩跑完了马拉松，打破了纪录。
It's a well-known fact that smoking is harmful to your health.吸烟对你的健康有害，这是一个众所周知的事实。
in fact 事实上
【提示】in fact是一个副词短语，用来引入一个真实的情况、事实或提供进一步的信息来支持一个声明或观点。如：
In fact, I think we should stay here for another day. 事实上，我觉得我们应该在这里多待一天。
I thought she wouldn't come,but in fact, she arrived early. 我以为她不会来，但事实上，她来得很早。
fact n. 现实；实际情况
increase v. 增长；增加
The population has increased from 1.2 million to 1.8 million.人口已从120 万增加到了180万。
【联想】decrease v.(使大小、数量等)减少，减小，降低
介词by在这里用于表示数量或程度。又如：
House prices went up by 10%.房价上涨了10%。
the late 1700s 18世纪末
【提示】“世纪”有两种主要的表达方式：
使用“序数词+century” 使用数字
在17世纪初 in the early 17th century in the early 1600s(读作in the early sixteen hundreds)
在18世纪中叶 in the mid 18th century in the mid 1700s(读作in the mid seventeen hundreds)
在19世纪末 in the late nineteenth century in the late 1800s(读作in the late eighteen hundreds)
在21世纪 in the 21st century in the 2000s(读作in the twenty hundreds)
see you again(共25张PPT)
语法单元
Unit4 Weather and our lives
教师______
学校______
it的用法
1.人称代词it用法
2.非人称代词it
3.常用it固定句型
4.总结与练习
it可用来指代前文提到的人,物或事情,也可以用来指时间,金钱,距离,天气等自然现象
一、it 做代词:
1. it作人称代词
⑴. 指前文提到的事物，以避免重复:
Shantou is a beautiful city, isn’t it
⑵. 指不明性别的婴儿或不明身份的人:
Look，that’s a baby! It looks like a doll.
Is this your wallet No, it isn’t.
⑶.代替指示代词this/that
There is a cat on the desk. It looks like a hat.
Who is knocking at the door It must be Bill.
指代时间、天气、距离、温度等。
a) It is 5 o'clock. (指时间)
b) It is raining. (指天气)
　 It is cold. 天气冷。
c) It is 10 miles to the city. (指距离)
指代时间、天气、距离、温度等
2. it作非人称代词
二、it 做引导词
·I find it hard to learn gymnastics.
我发现学体操很难。
·I feel it necessary to learn every day.
我觉得每天学习很有必要。
·I made it a rule to keep a diary every day.
我定下一个规矩,每天写日记。
·I believe it no use reading without understanding.
我认为只读书不理解没用。
2.作形式宾语
结构：
主语+ 动词+(形式宾语)it+(宾语补足语)形容词或名词+(真正宾语)不定式或动名词或宾语从句。
It is important to learn a foreign language. 学习一门外语是很重要的。
重要句型：
it takes sb. some time to do sth. 完成某事需要某人花费多少时间
It takes me an hour to finish my homework every day.我每天完成作业需要一个小时。
2. 形式主语（真正的主语是后面的不定式）
三、it固定句型
1.It is + 名词 + to do sth.
It is my pleasure to help you.
It is a good idea to do exercise every morning.
抽象名词
2.It is + 形容词 + to do sth.
It is hard to finish the work on time.
It is easy to work out this problem.
It is+形容词+for/of sb.+to do sth.
形容词修饰“事”用for
形容词修饰“人”用of
it is kind of you to help me.
it is important for you to work out the problem.
对于某人来说
3.It is time(for sb.)for sth./to do sth.
It is time for class.
It is time for you to give a talk.
4.It takes sb. some time to do sth.
It takes him 20 minutes to drive to the office every day.
5.It is + the 序数词+ time that...
It is the first time that I have been to Shanghai.
6.It is said/reported /believed that...
It is said that he is rich.
It is believed that the prices will be rising.
物价
7.It is no good (use) doing sth.
It is no good learning English without speaking English.
It’s no use trying to argue with him.
动名词作主语
总结与练习
1.Was it during the Second World War
______ he died
A. that B. while
C. in which D. then
2.Is ______ necessary to complete the
design before National Day
A. this B. that
C. it D. he
3. I don’t think _______possible to
master a foreign language without
much memory.
A. this B. that
C. its D. it
4.Does ____matter if he can’t finish
the job on time
A. this B. that
C. he D. it
5. The Parkers bought a new house but ______ will need a lot of work before they can move in.
A. they B. it
C. one D. which
6. In fact _______ is a hard job for the police to keep order in an important football match.
A. this B. that
C. there D. it
7. Tom’s mother kept telling him that he
should work harder, but ______ didn’t help.
A. he B. which
C. she D. it
8. ______ is a fact that English is being accepted as an international language.
A. There B. This
C. That D. It
他来饭店的时候，已经是12点50分了。
It was already 12:50 when he got to the restaurant.
照顾孤儿是他的职责。
It was his duty to take care of the orphans.
修车花了我一百美元。
It took me 100dollars to repair the car.
看样子她得了重感冒。
It seemed/ appeared that she has caught a bad cold.
9. 完成下列汉译英的练习。
To have a good knowledge of history is very helpful for all of us.
It is very helpful for all of us to have a good knowledge of history.
To learn a foreign language is very useful for a scientist.
It is very useful for a scientist to learn a foreign language.
To finish this work in three hours is necessary.
It is necessary to finish this work in three hours.
To sit by the fire with a book in winter is very comfortable.
It is very comfortable to sit by the fire with a book in winter.
To guess where they are is difficult for me.
It is difficult for me to guess where they are.
To see you staying in bed all the time makes me feel sad.
It makes me feel sad to see you staying in bed all the time.
10. 用it作形式主语，改下下列句子。
see you again

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