用so that表目的
so as to和so that均可表示目的,两者的区别是,前者引出不定式,后者用以引导目的状语从句。与用so as to do sth表示目的的情形相似,so that引导的目的状语从句通常位于主句之后。如:
I will give him a key so that he can get into the house whenever he likes. 我会给他一把钥匙,好让他能随时进来。
I got here early so that we could have a few minutes alone together. 我到这儿早些是为了我们能单独在一起待几分钟。
They wrote the notices in several languages so that foreign tourists could understand them. 他们把通知用几国文字写出来,以便让各国游客都能看得懂。
有时可省略其中的that。如:
Leave the keys out so (that) I remember to take them with me. 把钥匙放在外面,好让我记得带。
I deliberately didn’t have lunch so (that) I would be hungry tonight. 我有意没吃午饭,为的就是让自己今晚能感到饿。
so that 引导的目的状语从句有时还可置于主句之前(但是,若so that引导的从句是表示结果,则不可放在句首)。如:
So that I shouldn’t worry, he phoned me on arrival. 为了不让我担心,他一到就给我打了电话。
So that I shouldn’t forget it, I made a knot in my handkerchief. 为了免得忘记,我将手帕打了一个结。
So that the coming generation can learn the martial arts, he has recently devoted much time to writing books on the subject. 为了下一代能够学会这些武术,他近来花了许多时间著书立说。