as引导时间状语从句,主句和从句应用什么时态?是不是都用进行时?
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as引导时间状语从句,主句和从句应用什么时态?是不是都用进行时?
as引导时间状语从句,主句和从句应用什么时态?
是不是都用进行时?
as引导时间状语从句,主句和从句应用什么时态?是不是都用进行时?
As作连词引导时间状语从句时,着重强调主句和从句中的动作同时发生,并且从句通常放在主句之前.归纳起来有下列两种情况:
1)状语从句的谓语动词是持续性动词,从句时态常用进行时态.
如:①As he Was waiting,he suddenly heard a voice from above……
②As Bethune and the other doctors were climbing the hills,they could see the enemy entering the village in the valley below.
2)状语从句的谓语动词是终止性动词,从句时态常用一般时态.
如:①As she stood there,she heard the first bell.
②As they looked up,they saw another cloud coming towards them.
③As they watched.it came nearer and nearer.
as副词 adv.
1.同样地, 一样地
She is as tall as her mother.
她和她母亲一样高。
The dining room was twice as big as the Tom's.
这个餐厅比汤姆的餐厅大一倍。
This is as difficult a problem as you are likely to ...
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as副词 adv.
1.同样地, 一样地
She is as tall as her mother.
她和她母亲一样高。
The dining room was twice as big as the Tom's.
这个餐厅比汤姆的餐厅大一倍。
This is as difficult a problem as you are likely to meet.
像这样的难题, 你可能会碰到。
介词 prep.
1.(表示时间)当还是…的时候
As a schoolboy, he showed every sign of genius.
当他还是个小学生的时候, 就显示出了天资聪慧。
2.(表示方式)以…的身份, 以…资格, 作为; 以…形式, 以作为; 以…角色, 扮演…角色; 如同, 像
3.(表示结果)成为, 看作, 看成
We had better treat it as a joke.
我们最好把它当作玩笑。
4.(表示目的)为了, 以…为目的
The dykes were built as a protection against the sea.
建筑堤坝是为了防止海水泛滥。
5.(表示举例)例如, 诸如…之类的
We talked about such subjects as the weather.
我们谈论了诸如天气之类的话题。
连接词 conj.
1.在…期间, 当…时候
I was coming in as he was going out.
我进来的时候, 他正出去。
2.尽管, 即使, 虽然
Intelligent as you are, I suspect you will fail.
尽管你聪明, 我猜想你会失败。
3.像…一样
4.由于, 因为
As you weren't there I left a message.
因为你不在那里, 我留了个信儿。
5.照…方式
6.正如；如同
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