知识点1:英语中七种常见目的状语
They tiptoed upstairs so as not to wake the baby. 他们踮着脚上楼，以免吵醒孩子。
We left in the daytime so as not to arouse suspicion. 我们在白天离开以免引起怀疑。
I shut the door quietly, so as not to wake the baby. 为了不惊醒宝宝，我轻轻地关上门。
三、用in order to do sth表目的
in order to do sth也是to do sth的变体。用in order to do sth表示目的时，它既可以用于句末，也可用于句首，但比较而言，用于句首时，其强调意味较浓。如：
She lied about her age in order to get the job. 她为了谋得那份工作隐瞒了年龄。
She arrived early in order to get a good seat. 她到得很早，图的是得个好座位。
Teamwork is required in order to achieve these aims. 完成这些目标需要团队合作。
In order to get the job you must be able to drive. 要做这项工作你得会开车。
In order to get into a good school, I must study even harder. 为了考入一个好的学校，我必须更加用功。
in order to do sth的否定式是in order not to do sth，意思是“为了不……”“以免”。如：
She slept in a separate room in order not to disturb him. 她在另一房间睡觉，为了不至打扰他。
Please reply at once in order not to lose this opportunity of a lower price. 请立即回复，以免失去这次低价的机会。
They must have worn gloves in order not to leave any fingerprints. 他们一定戴上了手套，以防留下指纹。[1]must,have,相关知识点

must have V-ed ...句型结构分析语法讲解：句子成分、什么句型句法，怎么用什么意思 They must have read the article. 他们一定读过这篇文章。 You must have seen him before. 你以前一定见过他。 He must have forgotten my name. 他一定忘了我的名字。

注意，in order to do sth 还有另外一个否定形式，那就是 not in order to do sth，其意为“不是为了……”。如：
Big farmers are moving in, not in order to farm, but in order to speculate with rising land prices. 大农场主正在不断涌进来，不是为了耕作，而是要利用不断上涨的地价进行投机。
This expression refers to encounters between ships of hostile nations. One ship might fire a shot at another, not in order to hit it, but to warn it to move. 这个表达源于敌对国船只在海上相遇时，一方可能向另一方鸣炮，不是为了击中目标，而是警告其快速离开。[2]expression单词记忆法

◆记忆方法一：联想方式：ex一些；p猪；re热；ss两个美女；i爱；on上记忆方法：一些猪热情地向两个美女进行了“爱上”的表达。◆记忆方法二：词根词缀记忆法：expression n 表达；表情（express+ion）,Press= press, 表示“挤压”

四、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：[3]so that,状语从句,相关知识点

so that同样可以用来引导结果状语从句，无论是否有副词作状语或形容词作表语，这就要得从意义上和so that从句的结构上来考虑，表目的的so that状语从句中通常情况下都含有一个情态动词。试比较：这个男孩很笨，所以他解不出这道数学题。注：① 表目的的so that 从句可以用in order that 替换；若主句和从句的主语一致的时候还可以用so as to或in or

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。[4]could,have,相关知识点

could have V-ed ...句型结构分析语法讲解：句子成分、什么句型句法，怎么用什么意思结构︰主词＋could have＋过去分词说明︰此句型意为“原本能够…但却未如此”。 He could have bought the car, but soon his pany went bankrupt. 他本来能买那辆车的，但没多久他的公司就倒闭了。

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：[5]that单词记忆法

◆记忆方法一：联想方式：th天河：at在记忆方法：那个天河区在广州

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。[6]would,have,相关知识点

If I had V-ed, I would have ...句型结构分析语法讲解：句子成分、什么句型句法，怎么用什么意思 I might have been incredulous had I not been accustomed to such responses. 若非我已经习惯了这样的回答，我可能不敢轻易相信。 Had he not apolo

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：[7]that,从句,相关知识点

区分 that 与 what 引导的从句[1]what单词记忆法◆记忆方法一：联想方式：w：我；hat：帽子记忆方法：猜，我帽子里有什么？查看详情>>that与what都可引导同位语从句修饰表示抽象概念的名词，对所修饰的名词的具体内容进行详细阐述。这类名词有：fact, idea, news, hope, belief, promise, thought, suggestion