1.定义：一般疑问句是疑问句中的一种，用来进行提问。可以用yes或no来作肯定和否定回答，注意，两种回答主语都只能为代词，其中否定回答只能用缩写，不能用全称，但am not例外，因为它没有缩写。
2.类型：
(1) 含有be动词（am/is/are/was/were）的陈述句变为一般疑问句，直接把be动词提到句首,然后把“.”变“?”即可，其中第一人称I和we要相应的变为第二人称you。肯定及否定回答用相对应的be动词来回答就可以了；
e.g. ①陈述句: I am a student.
一般疑问句: Are you a student?
肯定回答: Yes, I am.
否定回答: No, I am not.
②陈述句: Mary is isn’t good at English.
一般疑问句: Is Mary not good at English?
肯定回答: Yes, she is.
否定回答:No, she isn’t.
③陈述句: They are classmates.
一般疑问句: Are they classmates?
肯定回答: Yes, they are.
否定回答:No, they aren’t.
④陈述句: Tom and Mary were friends before.
一般疑问句: Were Tom and Mary friends before?
肯定回答: Yes, they were.
否定回答: No, they weren’t.
(2) 含有情态动词（can / could / may / might / will / would / should / must / need / dare等）的陈述句变为一般疑问句直接把情态动词提到句首，然后把“.”变“?”即可, 其中第一人称I和we要相应的变为第二人称you。肯定及否定回答用相对应的情态动词来回答就可以了；
e.g. ①陈述句: They can play the guitar.
一般疑问句:Can they play the guitar?
肯定回答: Yes, they can.
否定回答:No, they can’t.
②陈述句:My mother won’t go to Beijing tomorrow.
一般疑问句:Will your mother will go to Beijing tomorrow?
肯定回答: Yes, she will.
否定回答:No, she won’t.
③陈述句:Tom should stay at home.
一般疑问句:Should Tom stay at home？
肯定回答: Yes, he should.
否定回答:No, he shouldn’t.
注意：含有must的一般疑问句肯定回答直接用must，但否定回答需用needn’t;含有may的一般疑问句肯定回答可用can或者may来回答，但否定回答一般用can’t来回答。
e.g. ①一般疑问句: Must Tom do his homework at once?
肯定回答:Yes, he must.
否定回答:No, he needn’t.
②一般疑问句:May I use your pencil?
肯定回答:Yes, you may/can.
否定回答:No, you can’t.
(3) 含有实义动词的陈述句变为一般疑问句需要请助动词(do/does/did)，若谓语动词为原形请助动词do；若谓语动词为三单形式请助动词does；若谓语动词为实义动词过去式请did；然后把助动词提到句首，后面的实义动词必须变为原形；肯定回答和否定回答也用相应地助动词来回答；
e.g. ①陈述句: They play the piano every day.
一般疑问句:Do they play the piano every day?
肯定回答:Yes, they do.
否定回答:No, they don’t.
②陈述句: Tom doesn’t like listening to the music.
一般疑问句:Does Tom like listening to music?
肯定回答:Yes, he does.
否定回答:No, he doesn’t.
③陈述句: His father lived in Kunming last year.
一般疑问句:Did his father live in Kunming last year?
肯定回答:Yes, he did.
否定回答:No, he didn’t.
(4) 现在完成时结构（have/has done）中的have 或has以及过去完成时结构（had done）中的had本身就是助动词，没有实际意义，所以无需再请助动词，直接用have，has或had就可以了；
e.g. ①陈述句: Students have finished their lunch.
一般疑问句: Have students finished their lunch?
肯定回答:Yes, they have.
否定回答:No, they haven’t.
②陈述句: Tom hasn’t studied Chinese for eight years.
一般疑问句:Has Tom not studied Chinese for eight years?
肯定回答:Yes, he has.
否定回答:No, he hasn’t.
③陈述句: His father had read the book before.
一般疑问句:Had his father read the book before?
肯定回答:Yes, he had.
否定回答:No, he hadn’t.
(5) there be 句型的陈述句变为一般疑问句，直接把be动词提到句首即可，肯定及否定回答无需用代词，直接用there来回答即可。
e.g. 陈述句: There is an apple and three books on the desk.
一般疑问句:Is there an apple and three books on the desk?
肯定回答:Yes, there is.
否定回答:No, there isn’t.
(6)陈述句的主语为指示代词（this/that/these/those）时，变为一般疑问句时，肯定和否定回答要用it/they来代替，this/that用it来代替；these/those用they来代替；
e.g. ①陈述句: This is a pen.
一般疑问句:Is this a pen?
肯定回答:Yes, it is.
否定回答: No, it isn’t.
②陈述句: Those weren’t books.
一般疑问句:Were those not books?
肯定回答:Yes, they were.
否定回答: No, they weren’t.
③陈述句: These are Tom’s parents.
一般疑问句:Are these Tom’s parents?
肯定回答:Yes, they are.
否定回答: No, they aren’t.
(7)陈述句主语为复合不定代词（如everything/somebody/anyone等）时，变为一般疑问句时肯定和否定回答需要用it来代替；
e.g. ①陈述句: Everything is important for us.
一般疑问句:Is everything important for us?
肯定回答:Yes, it is.
否定回答:No, it isn’t.
②陈述句: Everybody is here.
一般疑问句:Is everybody here?
肯定回答:Yes, it is.
否定回答:No, it isn’t.
