after幾種用法：

　　一、after作介詞的用法：

　　1、after+名詞，作為介賓短語，

　　如：after 5 o'clock。五點(diǎn)以后。

　　He ran after the bus.他在那輛公交車后追著跑。

　　2、after+動名詞，也是作為介賓短語，

　　如：after having finished my homework。完成我的作業(yè)后。

　　I will go to bed after drinking the milk.

　　3、after+代詞，作為賓語的主語，

　　如：He went home after he finished all the work

　　二、after做副詞的用法：

　　如：three hours after三小時后; He told me after that he had not enjoyed the film.他告訴我后來他一點(diǎn)都不想看電影。

　　三、after做連詞的用法：

　　如：I saw them after I arrived.我到了之后才看到他們。

　　用作連詞引導(dǎo)時間狀語從句時注意：若主句用將來時態(tài)(或含有將來意味)，則時間狀語從句要用一般現(xiàn)在時態(tài) (表將來意義)表將來意義，而不能直接使用將來時態(tài)：他回來后我就走。正：I’ll leave after he comes back.誤：I’ll leave after he will come back.