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　　不定式的完成式和进行式

　　1)构成完成式：to+have done进行式：to+be doing

　　2)用法

　　完成式：如果不定式所表示的动作(状态)发生在主要谓语动作之前初中英语语法总结，那么不定式就要用其完成式。

　　进行式：如果主要谓语动作(情况)发生时，不定式所表示的动作正在发生，那么不定式就要用其进行式。例如：1.She feels relaxed to have finished writing her thesis before the deadline.2.The Vikings are believed to have discovered America.3.When you called me last night，I happened to be working on the computer.

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　　不定式的被动形式

　　当不定式的逻辑主语是动作的承受者时，不定式要用被动形式，包括它的一般式和完成式。例如：1.For twelve years，Spanish censorship did not allow Lorca's name to be mentioned and his work to be published.2.The snow was supposed to have been blown off the mountain.

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　　不定式的否定形式

　　否定形式是在不定式的标志to前加not。例如：1.I decided not to ask him again.2.Please remember not to leave the lights on when you are out.

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　　单项选择练习

　　1.______the seeds and they will grow.A.Water B.To water C.Watering D.Watered

　　2.The purpose of the scheme is not to help the employers but______work for young people.A.provide B.to provide C.providing D.provided

　　3.He arrived at the office early,______a good example to the others.A.set B.to set C.to be set D.having set

　　4.Please make my excuse at tomorrow’s meeting—I’ve got too much work______.A.to do to come B.doing coming　C.to do coming D.to do coming

　　5.We looked everywhere for the keys,but they are nowhere_____A.to find B.to have found C.to be found D.being found

　　6.After describing the planned improvements,she went on______how much they would cost.A.to explain B.explaining C.to be explaining D.having explained

　　7.To test eggs,______them in a bowl of water:if they float they’re bad,if they sink they’re good.A.put B.putting C.to put D.to be putting

　　8.Please remember______the plants while I’m away.A.watering B.to be watering　C.to water D.being watering

　　9.______wine,first you must press the grapes.A.Making B.To make　C.To be making D.Make

　　10.I’ve never been so poor______able to afford a meal.A.as to be not B.not as to be C.as not to be D.as to not be

　　11.I don’t know whether to stay in teaching or____another job.A.trying getting B.to try to get C.trying to get D.try get

　　12.I’ll have to change my clothes before I go out—I don’twant______like this.A.to see B.to be seeing C.to be seen D.being seen

　　13.In fact,she was the first woman______to such a post.A.to elect B.to be electingC.to have elected D.to have been elected

　　14.I’d like___over the Alps and looking down at the mountains.A.flying B.being flying C.to be flying D.be flying

　　15.I’m learning______a cake.Can you explain______one?A.to make,to make B.how to make,to makeC.to learn,how to make D.making,making

　　16.Whom would you rather_____with you,Jim or Jack?A.have go B.have to go　C.have gone D.has to go

　　17.The husband advised______to the south,but his wife advised him_____up the idea.A.moving,giving B.to move,to give C.moving,to give D.to move,giving

　　18.“Would you like to come for a walk with me?”“I’d prefer___,thank you.”A.not to B.to not C.not D.can’t19.I would mend your radio,but I don’t know______.A.how B.to C.how to D.to how

　　20.“I haven’t heard from Henry for a long time.”“What do you suppose______to him?”A.was happening B.to happen C.has happened D.had happened

　　21.When I handed the report to John,he said that George wasthe person_____.A.to send B.for sending it C.to send it to D.for sending it to

　　22.“Do you know the girl in red?”“She seems_____me at last month’s party.But I’m not sure.A.to introduce to B.to be introduced toC.being introduced to D.to have been introduced to

　　23.We all agreed______for another day,but Jim disagreed____A.to wait,to do so B.to wait,不填C.waiting,doing so D.waiting,不填

　　24.He made up his mind to devote his life_____pollution_____happily.A.to prevent,to live B.to prevent,from livingC.to preventing,to live D.to preventing,from living

　　25.I wish I’d been there—I would like____her face when his husband came in.A.to see B.to have seenC.seeing D.having seen

　　【参考答案】

　　1—5 ABBAC6—10 AACBC11—15 BCDCC16—20 ACACC21—25 CDBCB