1、一、动词不定式是一个仅仅含有动词原形和附加成分（宾语、表语）以及连带成分（状语）的短语，转换为从句时主要围绕动词做文章。既然不定式变成谓语动词，以下几点必需要考虑：1. 在原句中找出不定式的逻辑主语，使其成为转换成句子后的主语；2. 确定不定式所表达的时态或情态，把转换后的谓语动词变成相应的时态（将来、一般、完成或进行），有时候还有必要另加情态动词 can/could, may/might；3. 确定原不定式在句子中所充当的成分（主语、宾语、表语、定语或状语），然后加上必要的关连词改为相应的从句。二、与转换有关的不定式的相关知识A. 不定式的逻辑主语有下列几种情况1. 句子的主语就是不定式的逻
2、辑主语，如：He helped to build a reservoir. You mustcome to see me on Sunday.What have I done to make you so angry?2. 不定式的逻辑主语是相邻的名词Its kind of you to see me.We know her to be a brave girl.Did you see him enter the room?It is for you to decide.3. 不定式的逻辑主语存在于不言自明的语境中 To talk with him is a great pleasure. (
3、可能是 we, you 或 everybody) Our plan is to finish the work in two weeks. (we)It is wrong not to help others. (we, they 或 you)B. 不定式的时态1. 不定式的一般式的行为常表示下列两种时间：* 如果作宾补，与谓语动词同时发生，如：I saw him go out.Would you help me to put things in order?* 其他情况多数发生在谓语动词后，如：I hope to see you again.He wanted to be an actor.
4、2. 不定式的完成式的行为发生在谓语动词之前，如：I am sorry to have kept you waiting.3. 不定式的进行式的行为发与谓语动词同时发生，如：He seems to be recovering.C. 不定式的词性以及在句子中充当的成分1. 名词性主语： It is our duty to help you.宾语： She decided to try again. 表语： Her job is to take care of the children.2. 形容词性定语：He is always the first one to get up.3. 副词性目的状
5、语：He came here to see me yesterday.结果状语：He is too excited to go to sleep. 形容词补足语：I am sorry to hear that.三、转换实例1. 不定式 名词从句to talk with him is a great pleasure. ( 主语)-It is a great pleasure (that we can) talk with him.He hopes to be a sailor.（宾语）- He hopes (that he can) be a sailor.My suggestion is t
6、o wait a little longger.（表语）- My suggestion is (that we should) wait a little longger.The plan to finish the work in two weeks has been handed in. （同位语）- The plan (that we/they should) finish the work in two weeks has been handed in.2. 不定式 定语从句He is the only one to go to the party in our class.- He
7、is the only one (who will/may) go to the party in our class.3. 不定式 状语从句We all work hard in order to complete our assignment in time. (目的)- We all work hard in order (that we can) complete our assignment in time. We hurried so as to be in time for the meeting. (目的)- We hurried so as (that we might) b
8、e in time for the meeting.He is too young to join the army (结果)- He is too young (that he could not) join the army.His behaviour was such as for us all to refuse to receive him in our homes. (结果)- His behaviour was such (that we all refused) to receive him in our homes. Im very sorry to have kept yo
9、u waiting. (原因)- Im very sorry (because/as/for I) have kept you waiting.四、不定式的转换有时候不能死板硬套上面的格式，有些特殊情况还需要特殊对待。如：For a moment (I seemed to) have lost consciousness.- (It seemed that I) had lost consciousness.(They happened to) meet each other in the street.- (It so happened that) they met each other i
10、n the street.宾语从句是英语学习中的重点、难点，也是中考的热点。宾语从句与不定式（短语）的转换是中考考点之一，现将应注意的问题归纳如下： 1.【考题引导】 A：They havent decided which camera they will choose.（2004 年滨州） B：They havent decided which camera to choose. 【要点领悟】 当主句谓语动词 hope，agree，wish，decide，choose 等后接 that 引导的宾语从句，并且该从句的主语与其主句的主语一致时，宾语从句可转换成不定式（短语） 。如： A：The
11、girl hopes that she can be a doctor some day. B：The girl hopesto be a doctor some day. A：Father decided that he would buy a new computer for me. B：Father decidedto buy a new computer for me. 2.【考题引导】 A：Do you know when we will visit the Great Wall?（2004 年襄樊） B：Do you know when to visit the Great Wal
12、l? 【要点领悟】 当主句谓语动词 know， tell，forget，remember，learn，explain 等后接疑问词（连接代词/副词）引导的宾语从句，且该从句的主语与主句的主语一致时，宾语从句可转换成“疑问词（连接代词/副词）+不定式（短语） ”形式。如： A：We dont know what we should do next. B：We dont know what to do next. A：Jim told Lin Tao how he would spend the day. B：Jim told Lin Tao how to spend the day. 3.【考题
13、引导】 A：Could you please teach me how I search the Internet? （2003 年邢台） B：Could you please teach me how to search the Internet? 【要点领悟】 当主句谓语动词 tell，ask，show，teach 等后接双宾语，且直接宾语是疑问词（连接代词/副词）引导的宾语从句（从句主语与主句的间接宾语一致）时，宾语从句可转换成“疑问词（连接代词/副词）+不定式（短语） ”形式。如： A：Could you tell me how I can start the machine? B：C
14、ould you tell me how to start the machine? A：She asked me which skirt she should choose. B：She asked me which skirt to choose. 注意：以上三种情况中，宾语从句的谓语多表示将来意义。 4.【考题引导】 A：We found that he was a clever boy.（2003 年南京） B：We found him a clever boy. 【要点领悟】 suppose，feel，think，believe，find 等后接的宾语从句可转换为含有不定式短语的复合
15、宾语。 1）宾语从句的主语转换成宾语，从句的谓语部分转换成宾语补足语的不定式短语“to be+形容词/名词” 。如： A：I find that the plan is interesting. B：I findthe plan （to be） interesting. A：All of her friends suppose that she is a good student. B：All of her friends suppose her to be a good student. 2.宾语从句“it is +形容词/名词+不定式短语”转换成“it （形式宾语）+形容词/名词（宾语补足语）+不定式短语（宾语） ”的复合宾语。如： A：We find it is difficult to please her. B：We find it difficult to please her. A：I think it is my duty to take good care of my old parents. B：I think it my duty to take good care of my old parents. 本文来源于 外语爱好者网站(http:/) 转载请以链接形式注明出处 网址：http:/
