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　　词形变化( Word Form )应试技巧

　　1.熟练掌握动词词形变化规律。注意：动词形式既包括谓语动词的各种形式，如时态、语态及语气(直陈、虚拟)等，虚拟语气为重点，几年来的考题中都有这方面内容;也包括非谓语动词的各种形式。所以做动词的词形变化时，首先要搞清楚它在句中是谓语动词还是非谓语动词，然后再作相应的变化。

　　2.认真学好并熟悉课文。本题所选用的句子是根据教材中出现的句子编写的，其中多数来自课文，所以熟悉教材十分重要。

　　3.认真钻研相关的语法讲解。主要指谓语动词、非谓语动词、形容词、副词比较等级、情态动词、虚拟语气\形容词比较级、最高级，等部分。

　　动词：动词是考试的重点。主要包括：动词的时态、语态、语气和非谓语动词。

　　1)动词的时态：重点是动词的过去时、完成时。

　　So far， Irving ______(live) in New York City for ten years. has lived

　　Many a writer of newspaper articles_______(trun) to writing novels during the past decade. has turned

　　Some people think relations between people _______(deteriorate) so much that understanding and friendship are almost impossible . have deteriorated

　　Nearly a week passed before the girl was able to explain what _______(happen) to her.

　　had happened

　　In the past two decades， research _____(expand) our knowledge about sleep and dreams . has expanded

　　2)动词的语态：主要掌握各个时态的被动式。

　　The nations that _______actively ________(involve) in earthquake prediction programs include Japan， Russia， and the United States. are involved

　　There __________(estimate) to be more than 20，000 overseas domestic servants working in Brtain in 1995. were estimated

　　3)动词的语气：

　　A.掌握非真实条件句中，谓语动词在主句和条件句中的虚拟语气形式。

　　If you had come earlier， you ______ (not miss) the first act of the play.

　　would not have missed

　　If it hadn‘t been for your help， we _____(be) in real trouble.

　　would have been

　　B.在表示建议、命令、要求以及表示“重要性”和“紧迫性”等含义的主语从句、宾语从句、表语从句和同位语从句中，谓语动词常用虚拟语气，由“动词原形”或“should + 动词原形”构成。 should 常常省略

　　I would recommend that you _______(think) about doing something similar for yourself. (should) think

　　It was imperative that students ______(finish) their papers before July 1st.

　　(should) finish

　　C.动词wish 、would rather (sooner)、if only、as if 后的虚拟语气。

　　I would rather he _____(buy) the house next year.

　　bought ( 表示从句中动作尚未发生)

　　She treats me as if I ______ (be) a stranger. were

　　The manager told us to be friendly to the visitors as if we _____( meet) them before.

　　had met

　　If only we ______(have) a phone! I‘m tired of waiting outside the public phone box.

　　D.in case ， for fear that ， lest 等词后从句的谓语动词为(should) + 原形。

　　He took his umbrella with him lest it _______ (rain.)

　　(should) rain

　　E.在It is (high) time that 从句中谓语动词一般用过去时动词。

　　It‘s high time that we _______(take) firm measures to protect our environment. took

　　F.时间错综条件句，动词的形式要根据表示的时间调整。

　　如果我们早动身，现在就不会在雨中走了。

　　If we had set out earlier，we wouldn‘t be walking in the rain.

　　(从句中动作发生在过去，主句中动作发生在现在。)

　　4)动词的非谓语动词形式：

　　A.动词不定式：主要考查动词不定式作定语、宾语、宾语或主语补足语等的用法。还要注意动词不定式的被动式与完成式。

　　不定式作定语：If there is no choice， there is no decision ______(make) to be made

　　不定式作宾语： Robots ， already taking over human tasks in the automotive field， are beginning ________(see) . to be seen

　　不定式作宾补 I notice him _______( leave ) the classroom. leave (可省略to)

　　不定式作主补：They were often compelled ______(work) twelve or fourteen hours a day.

　　to work( 不可省略to)

　　We make them (to) work day and night. 不定式作宾语补语，在有些动词后可以省略TO

　　They are made to work day and night. 不定式作主语补语时，不可省略TO

　　B.分词：主要考查分词作定语、状语、宾语补足语的用法。注意现在分词与过去分词的区别。 另外，还有现在分词的被动式与完成式的形式。

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