2019-2020同步外研英语选修七新突破讲义：Module 4 Section Ⅲ Grammar——时间状语从句和省略

Section Ⅲ Grammar ——时间状语从

句和省略

②“The moment I heard it ，”he said ，“I

knew it was a completely new kind of

music.” ③The first time that rap artists recorded their music ，musicians recorded the backing tracks (the music without the 1.句①～⑤中黑体部分在句中引导的是时间状语从句，句⑥～⑦为省略句。 2.句④⑤为no sooner...than.../hardly...when...句式，表示

一、时间状语从句

在复合句中起时间状语作用的句子称为时间状语从句。时间状语从句常用when ，while ，as ，until ，since 或表示时间意义的名词短语等引导。

1．when ，while ，as 的用法

他父亲去世时他才九岁。

Jack was working in the lab when the power cut occurred.杰克正在实验室里工作，这时突然停电了。

They arrived while we were having dinner.

他们到时我们正在吃晚饭。

While I played the piano，my sister did her homework.我弹钢琴的时候姐姐在做作业。

As years go by，China is getting stronger and richer.随着时间一年一年过去，中国变得越来越富强了。

I saw my mother as I was getting off the bus.

我下公共汽车的时候看见了我妈妈。

[名师点津]

when在be about to do...when...，be doing...when...，had done...when...，be on one's way...when...，be on the point of doing...when...等结构中，作“正在那时”讲，表示某个动作正在发生或刚刚发生，另一动作同时发生。

He was about to leave when someone knocked at the door.

他刚要离开就有人敲门。

[即时演练1]选词填空：when，while，as

①It's much easier to make friends when you have similar interests.

②While/When in Vienna he studied music.

③You will grow wiser as you grow older.

2．until，till的用法

他一直等到她讲完。

You can't go home until you finish your work.

工作完成后你才能回家。

[名师点津]

(1)置于句首或在强调句中时常用until，其他情况until和till可通用。

Until you told me，I had no idea of it.

直到你告诉我，我对此事才有所了解。

(2)如果将“not until...”结构放在句首，那么主句要部分倒装。

Not until his bike looked almost new did he stop cleaning it.直到他的自行车看起来几乎像新的一样，他才停止擦洗。

3．before，since的用法

(1)before

①意为“在……之前”，置于主句前后均可。

Before the sun sets，we must go home.

太阳落山前，我们必须回家。

②如果before引导的从句位于主句之后，有时不能译成“在……之前”，而要译成“过了多久才……，还未……就”等。

The struggle lasted four years before the North won in the end.

斗争持续了4年北方才最终获胜。

He almost knocked me down before he saw me.

他几乎撞到我时才看见我。

She left before I could have a word with her.

我还没来得及和她说句话，她就离开了。

③before常用句型：

It will be two years before he leaves the country.

再过两年他才会离开这个国家。

It was two years before he left the country.

过了两年他才离开这个国家。

(2)since

①since意为“自从”时，所引导的从句使用非延续性动词，主句使用完成时态。

Since he graduated from college，he has worked in this city.大学毕业后，他便在这个城市工作。

②since的常用句型：

It is five days since he came here.

他来这儿5天了。

It was three years since she had not lived in this city.她已有三年不住在这个城市了。

[即时演练2]选词填空：since，before

①I have written home once since I came here.