具體用法：

　　1、指未發(fā)生的動(dòng)作。時(shí)態(tài)規(guī)律是“主將從現(xiàn)”，即主句用一般將來時(shí)，從句用一般現(xiàn)在時(shí)代替一般將來時(shí)。

　　I’ll tell him the plan as soon as I see him.

　　我一看到他就告訴他這個(gè)計(jì)劃。

　　He’ll go home as soon as he finishes his work.

　　他一完成工作就回家。

　　I’ll write you as soon as I get there.

　　我一讀完就把書還回去。

　　2、如果強(qiáng)調(diào)過去發(fā)生的兩個(gè)動(dòng)作有先后關(guān)系，從句謂語動(dòng)詞可以用過去完成時(shí)。例如：

　　As soon as they (had) returned from London, they drove to see their sick aunt.

　　他們一從倫敦回來，就開車去看望他們患病的姨媽。

　　After left as soon as he had drunk his coffee.

　　Andrew一喝完咖啡就走了。