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after doing的用法總結

after doing的用法總結

r作連詞使用時,連接兩個從句。語法結構為“B happened after A happenen"或”After。

A happened,B happened.",它們含義一樣,都是指“A事件首先發生”,一定要注意第二個結構中的“,"。

I went to America after I left school.

After I left school,I went to America.我離開學校後,我去了美國。

He did military service after he went to university.(=He went to university first.)我上完大學後,我去參軍了。

After he did military service,he went to university.(=He did military service first.)我參軍完後,我去上了大學。

r用作連詞,引導狀語從句時通常用現在時表示將來的含義。如:

I'll telephone you after I arrive.(r I will arrive.)

我到達後將打電話給你。

r引導的從句,我們習慣用完成時態。一般用現在完成時(have+過去式)代替現在時,用過去完成時(had+過去式)代替過去時。

I‘ll telephone you after I've arrived我到了後打電話給你。

After I had left school,I went to America.我離開學校後,我去了美國。

【注】在狀語從句中,用完成時態和用其他時態並沒用很大區別,只是我們習慣用完成時態強調”某件事情在另外一件事情開始時已經完成”。

4.在正式用語中,我們也常用“after+V-ing"結構。

After completing this form,return it to the director's office.完成這份表格後,把它交到行政辦公室

He wrote his first book after visiting Mongolia.他參觀完蒙古後,寫了他的第一本書。

1. 用作連詞時,它所引導的時間狀語從句通常要用一般現在時來表示將來意義(若強調完成也可用現在完成時),但不能直接使用一般將來時。如:

請告訴她我買些東西就回來。

誤: Please tell her I’ll come back after I will do some shopping.

正:Please tell her I’ll come back after I do [have done] some shopping.

2. 一般説來,如果在過去某一時間內先後發生了兩個動作,那麼先發生的動作用過去完成時,後發生的動作用一般過去時。但是若用了連詞 after 來連接這兩個動作,由於 after 本身已説明了兩個動作的`先後關係,所以兩者均可用一般過去時。如:

After he (had) closed the door, he left the house. 關了門之後,他就離開了家。

3. 有時以連詞 after 引導的時間狀語從句可以換成一個以介詞after 引導介詞短語或以連詞 after 引導的分詞短語,而意義不變。如:

He went to bed after he had supper (=after supper). 吃了晚飯之後,他就上牀睡覺了。 After she (had) finished (=After having finished / After finishing / Having finished) her work she left theoffice. 她幹完活後就離開了辦公室。

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