上次，我們梳理了狀語從句的概念，開啟了它的大門?？扇f萬沒想到：里面還有9個(gè)小房間，分別住著

時(shí)間、地點(diǎn)、原因、條件、目的、結(jié)果、讓步、方式和比較狀語從句

<(￣︶￣)>沒見過大世面的小編不知如何是好，只有挨個(gè)摸索其中的考點(diǎn)啰！

所以，今天我們打開的是時(shí)間狀語從句之門，學(xué)習(xí)when/while/as三者的區(qū)別：


一、when/while/as考點(diǎn)講解：

1).?when既可以接長動作（持續(xù)性動作），也可以接短動作（瞬間動作），可用于主句和從句動作同時(shí)發(fā)生，或從句動作先于主句動作。

When she came into my room, I was just reading a book.?

When he was a child, he was always trying out new ideas.

2).?while引導(dǎo)的動作必須是長動作（持續(xù)性動作），側(cè)重主句動作和從句動作之間的對比。

While they were talking, the bell rang.?

While my wife was reading the newspaper, I was watching TV.?

3).?as可表示從句和主句的兩個(gè)動作交替進(jìn)行或同時(shí)完成，譯為“一邊...一邊…”或“隨著......”。

The little girls sang as they went away. (一邊...一邊)

As the day went on, the weather got worse. (隨著)


二、注意：when的特殊用法！?。?/span>

when意為“正要做某事時(shí)，突然......”，常見句型有：

1.be about to do...when...

2.be on the point of doing...when...

3.be doing...when...

Eg:
Tom was about to close the window when his attention was caught by a bird.

He was on the point of leaving when someone knocked at the door.

We were doing homework when my mom came in.


小編寄語：when/while/as考點(diǎn)總結(jié)

1)表兩個(gè)動作的對比，只能用while；

Eg: While my brother was watching TV, my sister was cooking.

2)引導(dǎo)短暫性動作的詞用as, when；

Eg: As/When I stopped my car, a man came up to me.

3)當(dāng)從句的動作先于主句動作發(fā)生，只能用when?；

Eg: When you have finished your work, you may have a rest.

4)從句表示“隨著”和“一邊...一邊”之意，能用as。

Eg: As years go by, China is getting stronger and richer.?(隨著)

The students took notes as they listened. (一邊...一邊)

--摘自：百詞斬