of sb to do 用来说明人的性格特征和行为表现的动态形容词与不定式连用，
常用brave,careful cruel, generous,clever, foolish, kind,
，
modest, pilite,nice,rude,stupid,等形容词 It is wise of you not to agree with you. It is generous of him to lend me his car, 不定式作状语 ⒈作目的状语
(1) ①I stayed there to see what would happen.
②Henry has decided to go to the hospital to be examinedby the doctor. (2)有时为了强调，不定式前可加in order或so as。如： Bob took down my telephone number so as(in order)not toforget it. 有时为强调目的状语可把in order to或不定式置于句首，但so as to不能这样用。
在这种句式中不定式部 分可转换为so that,in order that,成为目的状语从句，如：
I stayed there so that (in order that)I could see whatwould happen.
(3)在部分表示感情色彩的形容词、过去分词或动词之后可接不定式，如：astonished,glad,happy,laugh ,pleased, sad,smile,sorry,surprised等。 ①We are glad to hear the news.
②I was surprised to see that a three-year-old baby could write so well. 在部分形容词后接不定式，用主动形式表示被动意义，这种句型中的主语是不定式的逻辑宾语。
如：The question raised by thestudent is difficult to answer. The room is really comfortable to live in.
常这样用的形容词有：
comfortable,easy,dangerous,difficult,expensive,fit,impossible等。 ⒉作结果状语
We came home after our holiday to find our garden neat and tidy. 不定式作结果状语还常用在下列句式中。如： ①so…as to;such…as to
I'm not so stupid(a fool) as to put it in writing.我不至于愚蠢到会把它写下来。 I'm not such a stupid fool as to put it in writing. ②enough…to
The speed is high enough for us to catch up with thefirst liner. ③only to
Jane hurried back only to find her mother dying inthehospital. ④too…to
I'm too tired to stay up longer.
但在下列结构中，too…to并非是“太……而不能……”之意。如： ①I'm only too glad to have passed the exam.考试及格我太高兴了。
；
（too修饰glad to have…，相当 于very）
②We have too much to learn.我们要学的太多了（不定式作定语）。 too....to 的用法 一、too... to... 的意义
too... to 句型形式上是肯定的，但是它在意义上却是否定的，表示\太……而不能……\。
too 的后面接形容词或副词的原级，to 的后面接动词原形。too... to...句型是简单句。
例如：
He is too young to join the army. 他年龄太小，不能参军。 二、动词不定式的逻辑主语
~
动词不定式所表示的动作的执行者与整个句子的主语不指同一人或物时，
需要在动词不定式前加上一个逻辑主语(常用for sb.)。例如：
The maths problem is too difficult for me to work out. 这道数学题太难我解不出来。
三、too... to... 结构表达肯定的意义
1. too 前面含有表示否定意义的词，如: not, never, nothing等时， too... to... 结构不表示否定的意义。例如：
It is never too old to learn. 活到老，学到老。(要学永远都不迟。)
2. 如果在too... to...这种结构的前面出现了only, 不仅免去了too的否定意义，
·
反而加强了too的肯定语气，only too 相当于very 或very much。例如：
I shall be only too pleased to get home. 到了家我将极其高兴。
3. too后接表示感情的形容词，如glad, pleased, happy, sad等时， too... to...句型不再表示否定意义，而表示的是肯定意义。例如： He is too sad to hear the bad news. 听到这个不幸的消息他太悲伤了。 四、too... to... 结构与enough...to... 结构及so... that...结构的相互转换 1. 将too...to...结构转换为enough... to... 结构时，要注意：
专升本考试英语语法总结
