导读：2021年普通专升本英语语法：用so as to do sth表目的用so as to do sth表意图so as to do sth是to do sth的变体，意思是“以便”“为了”“为的是”等 用so as to do sth表明意图时，它一般用于句末。如：I left a message so as to be sure of c
用so as to do sth表意图 so as to do sth是to do sth的变体，意思是“以便”“为了”“为的是”等，用so as to do sth表明意图时，它一般用于句末。如： I left a message so as to be sure of contacting her. 我留下了张条子以便与她取得联系 The two lovers dropped back so as to be alone. 那对情人落在后面，为的是两人好单独在一起。
I always keep fruit in the fridge so as to keep insects off it. 我总是把生果放在冰箱里，以防虫子吸食。
表明意图的so as to do sth有时也可放在句首（可是若so as to do sth是表明成果，则不可放在句首）。如： So as to show his boss what a careful worker he was， he took extra trouble over the figures. 为了向老板显现他是个作业非常仔细的人，他在这些数字上费了比往常更多的力气。
so as to do sth的否定式是so as not to do sth，意思是“为了不……”“避免”。如： They tiptoed upstairs so as not to wake the baby. 他们踮着脚上楼，避免吵醒孩子。
We left in the daytime so as not to arouse suspicion. 咱们在白日脱离避免引起置疑。
I shut the door quietly， so as not to wake the baby. 为了不吵醒宝宝，我轻轻地关上门。
专升本英语用so that表目的
用so that表意图 so as to和so that均可表明意图，两者的区别是，前者引出不定式，后者用以引导意图状语从句，与用so as to do sth表明意图的景象类似，so that引导的意图状语从句一般位于主句之后。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咱们能独自在一起待几分钟。
They wrote the notices in several languages so that foreign tourists could understand them. 他们把告诉用几国文字写出来，以便让各国游客都能看得懂。
有时可省掉其间的that。如： Leave the keys out so (that) I remember to take them with me. 把钥匙放在外面，好让我记住带。
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 引导的意图状语从句有时还可置于主句之前（可是，若so that引导的从句是表明成果，则不可放在句首）。如： So that I shouldn’t worry， he phoned me on arrival. 为了不让我忧虑，他一到就给我打了电话。
So that I shouldn’t forget it， I made a knot in my handkerchief. 为了以免忘掉，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. 为了下一代可以学会这些功夫，他近来花了许多时刻著书立说。
专升本英语用法辨析第一弹，助你升本成功
许多同学在学习英语的时候，一大难点便是许多意思附近或许相同的单词、词组不知道怎样差异和使用，小编特别为我们搜集、整理了十篇意思附近词组、单词的用法剖析，要好好学习哦！ 2018年一般专升本英语用法剖析 much too与too much的用法差异awake, wake, awaken, waken用法差异fool与foolish的用法差异friend与friendly的调配比照such as与for example的用法差异when, while与as的用法差异because, since, as与for用法剖析pleasant,pleasing,pleased的用法差异travel,trip,journey的用法差异continue与go on用法差异fit，match，suit的差异keen on doing sth 与keen to do sth介词below与under的用法差异介词across, along, through的差异get to do与get doing的三大差异
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参考资料来源1： 知乎
