so that 与 in order that 的比较
（1）引导目的状语从句时,so that 与 in order that多数可以替换.区别有两点：句首不用so that,只用 in order that；逗号之后不用so that,只用 in order that.
（2）它们的句型转化分别是：
so that = so adj./ adv.as for sb.(not) to do sth
in order that = in order for sb (not) to do sth
（3）so that 引导目的状语从句与引导结果状语从句的区别:
a)目的状语常常还未发生；结果状语在主句谓语之后已经发生.
b) 目的状语从句谓语常用may,can,might,could等；结果状语多是did过去式.
c) 目的状语之前不能有逗号,结果状语之前可以用逗号.
I've arrived early so that / in order that I may / can / will get a good view of the procession.
She has bought the book ,in order that she can follow the TV lessons.
They talked in a low voice in order that they should not be heard.
You must work hard in order that you can finish the work in time.
We have to take good care of our mountains so that they may always be covered with growing trees.
They gave their lives so that we might live a happy life.
I started early so that I might get there on time.
I shall put the note here so that he will see it when he comes.
He went to there early in order that he might get a good seat.
