新概念英语2知识精讲:directly/immediately+从句

　　1、directly/immediately+从句

　　该句型相对少见一些。其中的directly和immediately都用作了连词。如：

　　We'll come directly we have finished the work. (我们工作一结束就过来。)

　　I came immediately I heard the news. (我一听到这个消息,马上就来了。)

　　2、directly引导时间状语从句时，可以放在主句前面或者主句后面。例如：Directly the teacher came in everyone was quiet . / He came directly I called .

　　3、on doing

　　介词on后接动名词，也可以表示“一...就...”。如：

　　On arriving home I discovered they had gone. (我一到家就发现他们已经离开了。)