资源简介

(共24张PPT)
Unit3 Language in use
Module 2 Public holidays
学习目标
一、掌握以下单词和短语：
as soon as,since,each time,until,before
二、能够掌握时间状语从句以及常用引导词
三、能够熟读本课课文，更好的理解课文和从句
新课导入
思 考
1. 在和我们的朋友待在一起的这段时间里，我们会去青岛玩一天。
2. 在我们用餐时前，爸爸为食物而感恩。
3. 当（晚餐）结束时，每个人都帮忙洗盘子。
While we're staying with our friends，we're going to spend one day in Qingdao.
Before we begin dinner, my father gives thanks for the food.
When it is all over，everyone helps wash the dishes.
用从句来表达一件事情或一个行为发生的时间, 这个从句就叫时间状语从句。
不同的引导词引导的时间状语从句的意思也不同，常见的引导词有when，while，before，after，until，since和as soon as。
时间状语从句
一、when引导的时间状语从句
when引导的时间状语从句既可以表示点时间，也可以表示时间的延续，即表示一段时间，因此从句的谓语动词既可以是瞬间动词，也可以是延续性动词。此外，从句的动作既可与主句的动作同时发生，也可先后发生。
e.g. When I got home, I found the door open.
当我到家的时候，我发现门是开着的。
I used to like drawing when I was young.
我年轻的时候曾经喜欢画画。
二、while引导的时间状语从句
while引导的时间状语从句表示时间的延续，即表示一段时间，因此从句的谓语动词用持续性动词或状态动词，且持续性动词常用进行时态。此外，主句的动作发生在从句所表示的时间段之内或主从句动作同时发生。
e.g. There was a big noise suddenly while I was cooking.
我做饭的时候突然一声巨响。
He kept working part-time while he was at university.
他上大学的时候坚持兼职工作。
由when 和while 引导的时间状语从句
while
when
while 引导的从句的谓语动词必须是延续性的。
强调主句和从句的动作同时发生 。
while 有时还可以表示对比,翻译为“然而”。
when 引导的从句的谓语动词可以是延续性的, 也可以是非延续性的。
可以表示主句动作和从句动作同时发生，也可以是先后发生。
When he came in, I was having lunch.
他来时我正在吃午饭。
While he was reading, he fell asleep.
他在读书的时候睡着了。
类型 用法 例句
6.由since引导的时间状语从句 since意为“自从……”,从句用一般过去时,主句用现在完成时。常用句型:It has been+一段时间+since从句,意为“自从……以来已经很久了”。 We haven't seen him since he left.
自从他离开后,我们就没见过他了
It has been two years since I met you the first time.
从我第一次见你到现在已经两年了
类型 用法 例句
7.由until/till引导的时间状语从句 until/till表示动作或状态一直持续到某个时刻,即“直到……”。 (1)表示“直到……为止”,主句和从句都用肯定式,主句谓语动词为持续性动词。 I'll wait until /till he comes back.
我会一直等到他回来为止。
(2)表示“直到……才”,主句用否定式,从句用肯定式,主句谓语动词为短暂性动词。 She didn't go to bed until she finished her homework.她直到做完家庭作业才上床睡觉。
在时间状语从句中，主句和从句之间的时态一致问题一般分下列两种情况：
1. 若主句是祈使句，或主句中有情态动词，或主句中谓语动词是一般将来时，那么从句用一般现在时表示一般将来时。 例如：
Be careful when you cross the road. 过马路时要小心。
Put up your hand if you have any questions to ask.
如果你们有问题要问的话，请举手。
三、时态一致的问题
2. 若主从句谓语动词都是陈述过去，那么主从句都可以用一般过去时。例如：
She could sing when she was four years old. 她四岁的时候就会唱歌。
Betty:
Daming:
Ok, let’s go. It’s better to be early and get there (2) __.
Yes, we don’t want to get there (3) ___.
Oh, Daming! You always think about eating.
Well, it’s something to do (4) _____.
Don’t you want to make a wish for the New Year (5) _____.
No, it’s OK. I’ll make one (6) ______.
Betty:
Daming:
Daming:
Betty:
c
a
f
d
e
When are we going to the party
We’re waiting for you. We can go (1) __.
Daming:
Betty:
b
Language practice
Complete the passage with the words in the box. (P15)
before until when while
Christmas is a happy holiday. (1)______ it comes, people celebrate it in different ways. To many people in the world, this time of year is the season for giving and receiving presents. Children think that Father Christmas waits (2)______they are asleep and then comes in and leaves presents for them. They would like him to come (3)_______ they fall asleep, so they can see him. They do not know that it is their parents who put the presents at the end of their beds (4) ______ they are sleeping.
When
until
before
while
Language practice
新课讲解
6
Complete the conversations with the sentences in the box.
a) Enjoy yourself! b) Good luck!
c) Have a nice trip! d) Well done!
1. —We’re going to visit the Grand Canyon with Aunt Li for the holiday.
—_________.
2. —I’m going to take a vacation tomorrow.
—Oh, good!__________.
c
a
新课讲解
3. —I'm taking my driving test next week.
—________
4. —I've just run one thousand metres and beaten everyone!
　—________
b
d
2. Complete the conversation with the clauses in the box.
a) after the food has all gone
b) as soon as you’re ready
c) before there are too many people
d) before we go
e) when we get back
f) while we’re waiting for the New Year
/ɡ n/ adj. 用完了；用光了
Betty: When are we going to the party
Daming: We’re waiting for you. We can go (1) ________.
Betty: OK, let’s go. It’s better to be early and get there (2) ________.
Daming: Yes, we don’t want to get there (3) ________.
Betty: Oh, Daming! You always think about eating.
Daming: Well, it’s something to do (4) ________.
Betty: Don’t you want to make a wish for the New Year (5) ________
Daming: No, it’s OK. I’ll make one (6) ________.
b
c
a
f
d
e
wait for sb./sth. 等待某人/物
许愿
4. Do you get out of bed as soon as you
wake up
Yes, I do. / No, I don’t.
5. What do you say when someone gives
you a present
I say “thank you ” to him/her.
Complete the sentences with the correct form of the words or expression in the box. There may be more than one answer.
_______________ our friends arrived, we all went to the square.
2. ______ they were watching TV, we listened to music and sang traditional songs.
3. __________ it was twelve o’clock, we all shouted “Happy New Year”.
4. We stayed there _____ she arrived.
5. He has made a lot of progress _____ he started to learn English last month.
While
As soon as
until
since
after as soon as since until while
After/As soon as
Homework
Please write down the important points on your notebooks and finish the exercises of Unit 3.
It is a country in Southern Europe. Athens is the nation's capital and largest city. The first Olympic Games took place in Ancient Olympia in 776 BC.
What do you know about Greece
Complete the passage with the sentences in the box.
a) There were a lot of local people there as well as some tourists.
b) I had a wonderful day and I will never forget it.
c) During my first year, I went to the beach for the Labour Day holiday.
d) Someone made a circle of flowers for me to wear too.
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