1.as

soon as引導時間狀語從句當主句用一般過去時時，從句中用一般過去時或過去完成時。例：晚會剛一開始他就離開了。　　As soon as the party began/had begun he left.　　He left as soon as the party began/had begun.(位於主句前後均可)例：他一聽到那個訊息就暈倒了。　　As soon as he heard/had heard the news, he fainted.　　He fainted as soon as he heard/had heard the

news.2.as

soon as 可以表將來的事：這時主句用一般將來時，從句用一般現在。(主將從現)例：我一見到他就會告訴他這個訊息。　　As soon as I see him I will tell him the news.　　I will tell him the news as soon as I see him.(位於主句前後均可)我一到北京就會給你打電話。　　I will call you as soon as I arrive Beijing.　　As soon as I arrive Beijing I will call you.我一看到他就會告訴。　　I will tell him as soon as I see him.　　As soon as I see him I will tell him.當主句用一般將來時時，可以用一般現在時代替一般將來時