1、主动形式 被动形式 一般式 （not） to make （not） to be made 完成式 （not） to have made （ not） to have been made 进行式 （not） to be making 完成进行式 （not） to have been making 一作定语 置于被修饰的名词或代词之后。The next train to arrive is from Washington. 表示将来的动作Have you anything to be taken to your sister?只有动宾关系，则需用被动语态Do you have anything t
2、o say on the question? 与被修饰词之间有动宾关系，同时与句中其它词之间又有逻辑上的主谓关系时，尽管有被动含义，却仍用主动语态Would you please give me some paper to write on? 与被修饰词之间有动宾关系，如是不及物动词，则需加介词不定式作定语时=定语从句，例to arrive=that will arrive。二、作表语 不定式作表语表示具体动作或将来动作；动名词作表语表示抽象的一般行为。 To be kind to the enemy is to be cruel to the people. 当主语和表语都是不定式时，其含义
3、一是条件，一是结果（例）My chief purpose is to point out the difficulties ofthe matter. What I would suggest is to put off the meeting. 当主语是 aim,duty,hope,idea,mistake,plan,purpose,suggestion 等为中心词（例）时，或以 what 引导的名词性分句（例），不定式说明主语的内容。 Our work is serving the people. What he likes is taking a walk after supper. 句
4、动名词作表语，与主语部分可以转换，如 Serving thepeople is out work,-The story told by Mr.Wang is interesting. 而句中是现在分词作表语，说明主语的性质、状态， 三、作宾补 1) 动词 +宾语+不定式(to do) Advise allow appoint believe cause challenge command compel consider declare drive enable encourage find forbid force guess hire imagine impel induce inform
5、instruct invite judge know like order permit persuade remind report request require select send state suppose tell think train trust understand urge warn Father will not allow us to play on the street. 父亲不让我们在街上玩耍 I found him lying on the ground. 用分词做宾补( 现在分词表达主动，也表达正在进行，过去分词表达被动)=I found it importa
6、nt to learn. 先加形式宾语，再加形容词，最后加带 to do =I found that to learn English is important. 带一个从句此类动词还有 get，have。 。 -2) to + be 的不定式结构，作宾补的动词。 Acknowledge, believe, consider, think, declare(声称), discover, fancy(设想), feel find, guess, judge, imagine, know, prove, see(理解), show, suppose, take(以为), understand We
7、 consider Tom to be one of the best students in our class. 我们认为汤姆是班上最好的学生之一。 3) to be +形容词 Seem, appear, be said, be supposed, be believed, be thought, be known, be reported, hope, wish, desire, want, plan, expect, mean The book is believed to be uninteresting. 人们认为这本书没什么意思。 4) there be+不定式 believe,
8、 expect, intend, like, love, mean, prefer, want, wish, undrstand We didnt expect there to be so many people there.我们没料到会有那么多人在哪里。 5）as 短语做补语，如 regard, think believe, take, consider. Mary took him as her father . 玛丽把他当作自己的父亲。 四：作状语 1）目的状语 To only to (仅仅为了), in order to, so as to, so(such) as to (如此以便
9、) He ran so fast as to catch the first bus. 他飞快地跑以便赶上第一班车。 2）作结果状语，表事先没有预料到的，要放在句子后面。 What have I said to make you angry. 3) 表原因 Im glad to see you. The chair looks rather hard, but in fact it is very comfortable to sit on 当动词与介词连用时，常位于“形容词+动词不定式“ 结构的末尾。五、作主语 动词不定式作主语时，句子的谓语动词常用单数，其位置有以下两种： (1)把不定式置
10、于句首。如： To get there by bike will take us half an hour. (2)用 it 作形式主语，把真正的主语不定式置后3)当不定式作主语的句子中又有一个不定式作表语时，不能用 It is to的句型(错)It is to believe to see. (对)To see is to believe. 百闻不如一见。六、作宾语 1) 动词 +不定式 Want to do be warned not to do 被动2）动词+不定式=动词+ 宾语+不定式 ask, beg, choose, expect , hate, help intend like,
11、 love, need prefer, prepare, promise, want, wish I want to speak to Tom. 我想和汤姆谈话。 I want you to speak to Tom. 我想让你和汤姆谈话。 3）动词+疑问词+ to（疑问词带不定式在句中作成分时，谓语动词用单数）decide, know, consider forget, learn, remember, show, understand, see, wonder, hear, find out, explain, tell Please show us how to do that. 请演示
12、给我们如何去做。 The question is how to put it into practice. 问题是怎样把它付诸实施。 4)有些动词只能跟不定式作宾语=接 that 引导的从句。I decided to ask for my money back. I decided that I would ask for my money back. 5)当复合宾语中的宾语是不定式时，先用形式宾语 it 代替不定式，把不定式置于补语之后，即：主语动词it补语to do 句式。He feels it his duty to help the poor. -(1)语态 在 There be 结构
13、中，修饰主语的不定式可用被动，也可用主动。如：There are still many things to take care of (to be taken care of).但有时两种形式表达的意思不同，如：These is nothing to do now.( We have nothing to do now.) There is nothing to be done now.(We can do nothing now.) (2)时态 1) 现在时：一般现在时表示的动词，有时与谓语动词表示的动作同时发生，有时发生在谓语动词的动作之后。 He seems to know this.
14、I hope to see you again. = I hope that Ill see you again. 我希望再见到你。 2) 完成时：表示的动作发生在谓语动词表示的动作之前。 . He seems to have caught a cold. 3) 进行时：表示动作正在进行，与谓语动词表示的动作同时发生。 He seems to be eating something. 4) 完成进行时： She is known to have been wreaking on the problem for many years. 疑问词不定式结构 疑问词 who,what,which,wh
15、en,where,whether,how 后可接不定式构成不定式短语，在句中作主语、宾语、表语等。如： When to leave for London （When we shall leave）has not been decided yet. Mr. Smith didnt know whether to leave or stay there. I asked Professor Xuhow to learn English well.（how I could learn） The question was where to get the medicine needed. 以上例句中疑
16、问词不定式部分，均可转换为相应的从句形式。如：When we shall leave、how I could learn 经常在这种结构中使用的动词有：consider,decide,discover,explain,find out,forget,hear,know,learn,observe,understand,wonder 等。 +do1）情态动词 ( 除 ought 外，ought to)： 2）使役动词 let, have, make： 3）感官动词（在被动语态中则 to 不能省掉）I saw him dance. =He was seen to dance. 4）would ra
17、ther，had better： 5）Why / why not： 6）help 可带 to，也可不带 to, help sb (to) do sth： 7）but 和 except：but 前是 to do 时，后面出现的动词用 do He wants to do nothing but go out. 比较：He wants to do nothing but go out. He wants to believe anything but to take the medicine. 8）由 and, or 和 than 连接的两个不定式，第二个 to 可以省去： He wants to move to France and marry the girl. 9）discover, imagine, suppose, think, understand 等词后可以省去 to be： He is supposed (to be) nice. 他应该是个好人。
