Module2 Unit3 Language in use课件(共26张PPT) 外研版九年级上册

(共26张PPT)
外研版九年级英语上册
module2 Unit3 Language in use
Learning aims
To understand adverbial clauses of the time and to be able to make adverbial clauses with after, as soon as, before, since, until, when or while.
When 后加短暂动词（可用过去式）
While后加延续性动词。（一般为进行时）
when while
While we were doing our homework, the teacher came in.
We were doing our homework when the teacher came in.
while引导的时间状语从句
while引导的时间状语从句表示主句的动作在从句动作同时发生。由于while从句表示一个持续的行为, 所以从句中要用持续性动词或状态动词, 且持续性动词常用进行时态。
Don’t make any noise while I am recording.
我在录音时(你们)别发出声音。
Language Points
Adverb Clauses of Time
(时间状语从句)
用来修饰主句中的动词，副词和形容词的从句叫状语从句。
时间状语从句常用when, as,
while, before, after, since, till,
until, as soon as等连词来引导
Grammar
在英语中用从句来表示一件事情或行为发生的时间，那么这个从句叫作时间状语从句。时间状语从句在句子中所作的成分是时间状语。 时间状语从句常用when, while, before, after, as soon as, since, until等连词引导
Lead in
Read the sentences and talk about what you can find.
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.
And my family always go somewhere interesting as soon as the holiday begins.
We have celebrated the festival since the first pioneers from England arrived in America.
After they landed，their first winter was worse than any English winter.
时间状语从句：用从句来表达一件事情或一个行为发生的时间。
由after, as soon as, before, since, until, when, while引导时间状语从句。
1. _________ 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”.
While
After
As soon as
4. We stayed there _____ she arrived.
5. He has made a lot of progress _______ he started to learn English last month.
until
since
after as soon as since until while
New Year’s Day around the world
People wait until 12 pm. Everyone must have 12 grapes to eat at midnight. At each sound of the clock, we must eat a grape, but we can’t ever finish eating the grapes on time.
Spain
1. when的用法
引导时间状语从句:“当......的时侯”，既可以表示在某一时间点发生的事，又可以表示在某一时间段发生的事。主句与从句描述的动作或事情可以同时发生。
I loved math when I was at school.
我在学校时喜欢数学。
He looked aside when I spoke to him.
我对他说话的时候，他向旁边看。
时间状语从句
2. while 的用法
(1). 引导时间状语从句，意为“当……时候”“在……期间”。
His parents died while he was at school.
在他上学期间他父母去世了。
(2). 引导时间状语从句，意为“与……同时”。
You may go swimming while I’m having lunch.
我吃午饭的时间里你可以去游泳。
时间状语从句
3. before 的用法
(1). before 用作连词，其基本词义是“ 在…之前”，用来表示时间或顺序。
如：
Turn the light off before you sleep. 睡前先把灯熄掉。
Think before you speak.
说话之前应先想清楚。
时间状语从句
时间状语从句
4. after的用法 ，在…之后
(1). prep.
After testing, some students look very happy.
考试结束后，一些学生看起来很高兴。
(2). adv.
It happened twenty years after.
这事发生在20年之后。
(3). conj.
we all missed you after you left.
你走了以后， 我们都很想你
时间状语从句
5. as soon as 的用法：“一......就......”
as soon as连接的时间状语从句中，指未发生的动作，
规律是：主将从现
如：I will tell him the news as soon as he comes back。
他一回来我就把这个消息告诉他。
On New Year’s Day in Britain, people have parties. At 12 o’clock, the music stop, and they listen to the radio. Then everybody sings a song about friendship and kisses their friends________ they hear the Big Ben on the radio.
England
When / as soon as
They have a big party on New Year’s Eve，especially in Rio de Janeiro(里约热内卢 )．Just before midnight. They go to the beaches to watch fireworks（焰火）．We put flowers in the sea and think about things we want for themselves or others．We They usually wear white clothes for good luck during the New Year．
Brazil
when与while的区别
(1). when引导时间状语从句作“当……时候”讲时，既可与延续性动词也可与瞬间动词连用。
(2). while引导时间状语从句作“当……时候”讲时，
只能与延续性动词连用。
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。
时间状语从句
when和while 的区别
when与while 都意为“当……的时候”。when引导的时间状语从句，谓语动词既可以是延续性动词，也可以是非延续性动词；而while引导的时间状语从句，谓语动词只能是持续性的，而不可用终止性动词，并且常用进行时态。试比较：
When he woke up, it was eight o’clock．
While he woke up, it was eight o’clock．
When I was waiting for a bus, I met her．
While I was waiting for a bus, I met her．
√
×
√
√
when 表示“当······的时候”，既可以表示在某一时间点发生的事，又可以表示在某一时间段发生的事。主句与从句描述的动作或事情可以同时发生，也可以先后发生。
e.g. When the weather is fine, many people go out for a walk.
天气好时，很多人出去散步。
When I got home, I found my baby girl singing in the sitting room.
我到家时，发现我的小女儿正在客厅里唱歌。
1. when 引导的时间状语从句
while 引导的时间状语从句表示主句的行为在从句行为进行的过程中发生。while表示“当……时”，只能指一段时间，而不能指时间点。从句的动作或与主句的动作同时发生，或主句的动作是在从句动作的过程中发生的。因此，从句中的动词必须是表示延续性动作或状态的动词。
e.g. While they were crossing the Atlantic, many people died.
他们中的很多人在横渡大西洋时丧生了。
Don't make any noise while I am recording.
我在录音时（你们）别发出声音。
2. while 引导的时间状语从句
before 表示“在……之前”，引导时间状语从句时，表示主句动作发生在从句动作之前。
after表示“在……之后”，引导时间状语从句时，表示主句的动作发生在从句的动作之后。
I won’t tell you the truth before he comes back.
他回来之前我是不会告诉你事实的。
After she finished the work, she went to have supper.
她完成工作后去吃晚饭了。
3.before/after 引导的时间状语从句
as soon as表示 “一……就……”，引导时间状语从句时，表示主句动作紧接着从句动作发生。
I will call you as soon as I arrive home.
我一到家就给你打电话。
I hope to find him as soon as possible.
我希望尽可能快地找到他。
Mother became unhappy as soon as I mentioned his name.
我一提到他的名字，母亲就变得很不开心。
4.as soon as 引导的时间状语从句
1) 若since引导的状语从句的谓语动词是终止性动词（如go, come, leave, start, begin等）的过去时，则从句表示的时间是“从该动作开始的那一时刻起”。这是最常见的一种用法。如：
　He has studied very hard since he came to our school.
　自从来到我们学校， 他学习就非常努力。 　　
◆ since可引导时间状语从句， 意为“自从 …… 的时候起；从此；从 ……以来； ……以后”等。常与完成时连用
5. since 引导的时间状语从句
2) 若since引导的状语从句的谓语动词是持续性动词或表示状态的静态动词（如live, stay, study, learn, smoke, be等）的过去时，则从句表示的时间是“从该动作或状态的完成或结束时算起”。如：
I haven’t heard from him since he lived here.
从他不住这儿起， 我一直没有收到他的信。
I haven’t seen him since I was a student at school.
=I haven’t seen him since I left school.
　自从我毕业后就一直没见过他。 　　
until, till 表示 “直到”，引导时间状语从句，但放在句首时一般不用till而用until。当主句谓语动词是延续性动词时，主句常用肯定形式；当主句谓语动词是非延续性动词时，主句要用否定形式，即“not…until/till…”意为“直到……才……”。
eg. I worked until he came back.我工作到他回来为止。
I didn't go to bed until（till） my father came back.
直到我父亲回来我才上床睡觉。
6. until 引导的时间状语从句
Module 2
Unit 3
重点短语：as well, get together, have a picnic, spend some time, take a vacation, the end of,Labour Day,Independence Day,have a nice trip,well done,good luck,enjoy yourself
重点句式：时间状语从句
when：当……时候 while：当……时候
before：在……之前 after：在……之后
as soon as：一……就…… since：自从
until：直到……才……