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。