就是主句是一般将来时，从句用一般现在时表示将来1.if引导的条件状语从句We'll go shopping if it doesn't rain tomorrow.如果明天不下雨，我们将去购物。
2.as soon as一…就…I'll tell him the good news as soon as he comes.他一回来我就告诉他这个好消息。
3.not…until…直到…才…She will not leave until I come here.直到我回来，她才离开。
4.whenThe children will stay at home when it rains .下雨时，孩子们将待在家里。还有before,after等引导的时间状语从句，也有这样的用法
