“特殊疑问词＋动词不定式”的用法归纳一．由两部分构成：疑问词和动词不定式（wh-+to do）。
疑问词部分包括疑问代词who, whom, what, which和whose以及疑问副词when, where和how。
此外，连接词“whether”也适用.它主要具有以下几种功能：⑴当主语，如：● When to hold the meeting has not yet been decided.● Where to live is a problem.⑵当宾语，常接在forget, find out, discuss, decide, tell, teach, know, learn, wonder, remember等动词之后作宾语如：● We must know what to say at a meeting.● He could not tell whom to trust.● Do you know how to play bridge?⑶当表语，如：● The problem is where to find the financial aid.● The question is who to elect.⑷当名词同位语，如：● Tom had no idea which book to read first.● The question whether to confess troubled the girl.⑸用于宾语补足语,双重宾语。
某些动词后可接“sb.+ 疑问词 + 不定式”构成的双重宾语，这类动词常用的有advise, ask, show, teach, tell等如：● I can tell you where to get this book.● I ask her how to learn English.● He will advise you what to do.● Will you show me how to use the machine?(6) 作介词宾语：某些介词后面可接"疑问词＋不定式"作宾语，这类介词常用的有about, as, from, in, of, on, with等。
例如：He has no idea of how to answer this question. 他不知道怎样回答这个问题。
Della had only $1.87 with which to buy Jim a present. 德拉仅有$1.87为来吉姆买一件礼物。
(which是关系代词)You have a number of topics from which to choose. 你有很多题目可以选择。
(which是关系代词)二“特殊疑问词＋动词不定式”这种结构可以把复合句转为简单句。
如：I don’t know what I’ll do next. = I don’t know what to do next.The doctor told him when he should take the medicine. = The doctor told him when totake the medicine.同样，因为“特殊疑问词＋动词不定式”这种结构相当于一个名词性从句，所以可用同等成分的从句代替，从而把简单句转换为复合句。
改写时只需在疑问词后加上适当的主语，并把不定式改为适当的形式的谓语即可。
如：Which to choose is important. = Which we should choose is important.The question is where to go. = The question is where we should go.三、“特殊疑问词＋动词不定式”这种结构可构成独立问句。
如：What to do? 怎么办？How to get rid of the trouble? 如何摆脱困境？按照英语语法的习惯，疑问副词why 后不直接跟动词不定式，如：误：I don’t know why to choose that dictionary.正：I don’t know why you must choose that dictionary.但它可以接不带to的动词不定式，即动词原形，构成why do sth./ why not do sth. 肯定形式是表示某动作是不必要的或没有意义的，而否定形式是表示向某人提建议和表达看法，相当于祈使句。
Today is Sunday. Why not go out to relax yourself?Why pay more at other shops? We have the best value.练习：1.I have no idea when ___ her the bad news.A. will tellB. tellingC. tellD. to tell2. —Will you please show me how to do the role-play exercise?—Sure. Now let me tell you ____ first.A. which to doB. how to doC. when to doD. what to do3. I need your help because I don’t know ____.A. how to do itB. how to doC. what to do itD. what should I do4.—How are you feeling here?—It’s quite hot. I don’t know ____ to go or stay.A. howB. whenC. whetherD. whereIt’s too hard.5.—I don’t know ____ to do with this maths problem.— You can ask your classmates or teachers for help.A. whichB. howC. whatD. whenknow ____.6. —Millie, could you give me some advice? I don’ｔ—Why don’t you wear this red shirt?A. when to wearB. what to wearC. how to wearD. where to wear7. I’m going on a field trip but I haven’t decided__________.A. what to doB. to do whatC. where to goD. to go where8 —This physics problem is too difficult. Can you show me ________，Wang Lin？—Sure.A. what to work it outB. what to work out itC. how to work it outD. how to work out it9. Excuse me. Would you please tell me ________ buy a digital camera？A. what toB. where toC. what I canD. where can I10. There isn't any difference between the two. I really don't know ________.A. where to chooseB. which to chooseC. to choose whatD. to choose which用“疑问词＋不定式”改写下列句子。
1.How we should do it was discussed last night.__________ was discussed last night.2. I didn’t know where I should go.I didn’t know ____________.3. The difficulty was how we should cross the river.The difficulty was ____________ .根据汉语补全下列英语译文。
1. 何时动身还不知道。
____________ is unknown.2. 我忘了该怎么办。
I forgot___________.3. 我可以告诉你哪里可以买到此书。
I can tell you_________.4. Yao Ming 未决定下一步做什么。
Yao Ming hasn’t decide ____________ next.5.She has decided ____________. (到哪儿工作。
)6.Bill Gates knew ____________ (怎样帮助) children.7.I can’t decide ____________ (是否踢足球) or do homework.8. Paul knows ____________ (跟谁谈) for help.9.You should decide ____________ (做哪个) first.10.Simon just forgot ____________ (什么时间接) his friend.仁爱版英语九年级上册Unit3 Topic3测试题第二部分基础知识运用(55分)Ⅰ.单项选择。
(10分)( )1.—This physics problem is too difficult. Can you show me _____, Wang Li?—Sure.A.what to work it outB.what to work out itC.how to work it outD.how to work out it( )2.It is important _____ the piano well.A.of him to playB.for him to playC.of him playingD.for him to playing( )3.—Sorry, I can’t follow you. I beg your pardon?—_____A.You are welcomeB.That’s all right.C.Not at all.D.No problem.( )4.The old farmer felt like _____ a big house very much.A.to getB.getC.gettingD.got( )5.She _____ walk at night. How brave she is!toA.dare toB.dares toC.dare notD.doesn’t dare( )6.I will go to my doctor for _____ on healthy diet (饮食).A.an adviceB.some advicesC.any adviceD.some pieces of advice( )7.It’s my honor _____ to give a talk here.A.to inviteB.to be invitedC.invitingD.invite( )8.I usually go to the movies with my parents, but _____ alone.A.some timesB.sometimeC.at timesD.at time( )9.If you want to learn English well, i t’s useful to _____ before class and _____ after class.A.review; previewB.preview; reviewC.review; to previewD.preview; to review( )10.Listening, speaking and reading are all important _____ writing.A.besideB.besidesC.exceptD.expect第三部分写作(25分)Ⅰ.词汇。