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as引导时间状语从句的谓语特点

2011-07-14来源:和谐英语

as引导时间状语从句的谓语特点

 

■as 引导时间状语从句表示“当……的时候”“在……期间”时,该从句的谓语通常是那些表示动作意义的动词,而不能是be(是、在), have(有),like(喜欢),belong(属于)等表示状态或静态意义的动词。

我打算去邮局。——当你在邮局的时候,请帮我买几张邮票好吗?

误:I’m going to the post office.—As you are there, can you get me some stamps?

正:I’m going to the post office.—While you are there, can you get me some stamps?

■正因为 as 引导时间状语从句表示“当……的时候”“在……期间”时,从句的谓语不能是表示状态或静态意义的动词,所以当下面第一句变为第二句这样的状语从句时,不能再用 as,而应用 when:

As a student he had known great poverty.

=When he was a student he had known great poverty. 他当学生时,经历过很贫困的生活。

■但是,当 as 引导原因状语从句时,其谓语动词可以是状态或静态动词。如:

As there was very little support, the strike was not successful. 由于支持的很少,罢工未获成功。

As I was anxious to please him, I bought him a nice present. 因为我急于讨好他,我给他买了一件精美礼品。

As there isn’t anything more to do, I may as well go home early 既然这里没有别的事要做,我还不如早点回家。