比较since和for
3个回答

Since 用来说明动作起始时间,而for用来说明动作延续时间长度.

比如说 ：I have lived here for more than twenty years.

I have lived here since I was born..

My aunt has worked in a clinic since 1949.

Some new oilfields have been opened up since 1976.

I have known Xiao Li since she was a little girl.

My brother has been in the Youth League for two years.

I have not heard from my uncle for a long time.

但是也并非有for 作为时间状语的句子都用现在完成时.

I worked here for more than twenty years.

(我现在已不在这里工作.)

I have worked here for many years.

(现在我仍在这里工作.)

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