after当连词怎么用

Question

after当连词怎么用

Answer 1

after作连词使用时,连接两个从句.语法结构为“B happened after A happenen"或”After
A happened,B happened.",它们含义一样,都是指“A事件首先发生”,一定要注意第二个结构中的“,".
I went to America after I left school.
After I left school,I went to America.我离开学校后,我去了美国.
He did military service after he went to university.(=He went to university first.)我上完大学后,我去参军了.
After he did military service,he went to university.(=He did military service first.)我参军完后,我去上了大学.
2.after用作连词,引导状语从句时通常用现在时表示将来的含义.如：
I'll telephone you after I arrive.(NOT...after I will arrive.)
我到达后将打电话给你.
3.after引导的从句,我们习惯用完成时态.一般用现在完成时（have+过去式）代替现在时,用过去完成时（had+过去式）代替过去时.
I‘ll telephone you after I've arrived我到了后打电话给你.
After I had left school,I went to America.我离开学校后,我去了美国.
【注】在状语从句中,用完成时态和用其他时态并没用很大区别,只是我们习惯用完成时态强调”某件事情在另外一件事情开始时已经完成”.
4.在正式用语中,我们也常用“after+V-ing"结构.
After completing this form,return it to the director's office.完成这份表格后,把它交到行政办公室.