Page 24 - 高中英语小题狂做·选择性必修第四册·YL

2 高中英语小题狂做·选择性必修第四册·YL

when 和 once 意为“一……就……”,表示从句的动作一发生,主句的动作随即就发生。
As soon as he heard the news, he jumped for joy.

The boy burst out crying immediately he saw his mother.
The moment I heard the voice, I knew my father was coming.
(5) until 或 till 表示某动作一直延续到某时间点才停止,此时主句谓语动词是延续性动词,主句、从句都为肯定式。
这两个词可以换用,但 till 不可以置于句首,而 until 可以。 not until 表示某动作直到某时间才开始,主句谓语动词
是非延续性动词,从句为肯定式。
We walked along the river until / till it was dark.
He didn t know anything about it until I told him.

(6) before 意为“在……之前;还未……就……;不到……就……;……才……;趁……;还没来得及……就……”。
Before they reached the station, the train had gone.
It will be two years before he leaves the country.
(7) after 意为“在……之后”,表示主句的动作发生在从句的动作之后。
After you use plastic bags, you mustn t throw them about.
(8) since 意为“自从……以来/ 之后”,引导的从句常用一般过去时,表示自某一时间点以来,主句常用完成时态或
完成进行时态,表示动作的延续和频率。 主句谓语可以用延续性动词,也可用非延续性动词,用非延续性动词必须
强调动作的频率或多次、多个。
I have returned home twice since I settled down in the US.
(9) every time、each time、next time、the last time 等名词短语引导时间状语从句,意为“每当……” “每次……” “下

次……”“上次……”等。
Every/ Each time I was in trouble, he would come to help me out.
Next time you come, do remember to bring your son here.
2. 地点状语从句
引导地点状语从句的从属连词有 where 和 wherever 等。 表示具体地点时,从句可位于主句之前,也可位于主句

之后。 表示抽象条件时,从句需放在主句之前。
We should go where the Party needs us most.
You are free to go wherever you like.
Where there is a will, there is a way.
3. 原因状语从句
引导原因状语从句的从属连词有 because、as、since/ now that( 既然)、seeing that(鉴于)、considering that( 考虑
到)、in that(因为)等。
He was criticized by the teacher, because he was late for class.
Now that / Since everyone is here, we can begin our discussion.

Seeing that there were less than half the members present, the meeting had to be postponed.
4. 目的状语从句

目的状语从句的从属连词有 so that、in order that、for fear that / lest、in case 等。
(1) so that 和 in order that 意为“为了,以便”,引导的目的状语从句常与情态动词 can、could、may、might 等连用。 in
order that 引导的从句可以置于主句之前或之后,而 so that 引导的从句只能置于主句之后。
I am studying hard so that / in order that I can enter a famous university.
In order that we might see the sunrise, we started for the peak early.

(2) for fear that / lest 意为“唯恐,以免”;in case 意为“以防”。
Batteries must be kept in dry places for fear that / lest electricity should leak away.
Take your raincoat in case it should rain.
5. 结果状语从句
引导结果状语从句的从属连词有 so that 、so that、such that 等。