具體用法：

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

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

　　我一看到他就告訴他這個計劃。

　　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)生的兩個動作有先后關(guān)系，從句謂語動詞可以用過去完成時。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。