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1、句型转换：一般疑问句、否定句的变化规律要点精析一、陈述句该为一般疑问句或是否定句的变化规律1. 当句中有be动词（am,is are）时，改成否定句时，在be动词后加not;改成一般疑问句时，把be动词提前放于句首。例子：I am from China.I am not from China.Are you from China?小试牛刀：We are going to go shopping this weekend._Paris is the capital of France._2. 当句子中有情态动词时，改成否定句，在情态动词后加not；改成一般疑问句时，把情态动词放到句首。例子：Yo
2、u should go to school on time.You shouldnt go to school on time.Should I go to school on time?小试牛刀：I would like to go swimming after school._We must clean the classroom now._小学阶段接触的情态动词有：can , must , should, would, could , need , may(情态动词的后面接动词原形)3. 当句中既没有be动词又没有情态动词时，这时候就要使用到助动词。改成否定句，根据时态或者人称在动词前面
3、加上doesnt，dont，didnt；改成一般疑问句，根据时态，人称，使用助动词does,do ,did放在句首。温馨提示：（1）.一般现在时态且主语是第三人称单数的情况下使用:改为一般疑问句用does,改为否定句就用doesnt.（2）.一般现在时态而且主语为非第三人称单数的情况下使用：改为一般疑问句用do, 改为否定句就用dont.（3）.一般过去时态情况下使用：改为一般疑问句用did，改为否定句就用didnt.例子：My mother likes dancingMy mother doesnt like dancing.Does your like dancing?小试牛刀：The b
4、oy plays basketball well._My father goes to the Baiyun Hill very often._所有doesnt，dont，didnt，does,do ,did后面的动词都接原形 特别提醒：1.遇到第三人称和第二人称不需要变人称（当句子中有情态动词如must，can，could，should，need等时，需将第二人称改为第一人称。其他情况不用变。）例子：1.She is good at English.Is she good at English?2.You are students.Are you students？3.You should
5、finish your homework first.Should I finish my homework first?2遇到第一人称时，应将第一人称改为第二人称才可以。(I amAre you ; My father is Is your father; We areAre you; ）实战演练：1.There are some old bridges over the river.(改成一般疑问句)2.I would like to have some milk. (改成一般疑问句)3.They often go to the library on the weekend.( 改成一般疑
6、问句) 4.My friend go to school on foot. （改为否定句）5.I am going to do my homework tomorrow.( 改成一般疑问句)6Please read Lesson One(改为否定句) _ _ Lesson One，please7Jackie has lunch at schoo1(改为一般疑问句) _ Jackie _ lunch at school ?8. They go to bed early.(改为一般疑问句)_ they _ to bed early?9. Mike does well in English. （改为
7、否定句）Mike _ _ well in English.10.u Hai and Su Yang look the same.(改为一般疑问句) _ Su Hai and Su Yang _ the same?11. They studied at Guangzhou International school.(改为一般疑问句)_ they _ at Guangzhou International school?12. There is some water in the bottle.(改为一般疑问句)_ there _ water in the bottle?2.用情态动词的情况下有特殊
8、情况。（1）用must问的情况Must I come here before 9:00.Yes, you must .No, you neednt或是No, you dont have to.(2)用may问的情况May I smoke in the room?Yes, you may. 或是 Of course,you may.No,you may not/musnt/cant.或是Youd better not/Id rather you didnt./Please dont.(3)用need的情况Need I finish it today?Yes, you must/have/shou
9、ld.(肯定句不能用Yes ,you need.因为need只使用于否定句或是疑问句中。)No,you neednt/dont have to.（4）用could问的情况Could(Can)you?Yes,I can (不用could)（5）用shall问的情况Shall I/she/ he?No, you(she,he) neednt/cant/mustnt实战演练：一、对下面的句子作肯定回答和否定回答1.Is the boy in white T-shirt your brother?_2.Are your parents work in the same place?_3.Does th
10、e girl go to school on foot everyday?_4.Does the cat like eating fish?_5. Are there any milk in the bottle？_6. Must we borrow books with an ID card?_二、改写句子1. Chen Fei is always late for school.(改为否定句)Chen Fei is _ late for class.2. Mike did his homework at school.(改为否定句) Mike _ _ his homework at sch
11、ool.3. She found some apples in the fridge.(改为一般疑问)_ she _ _ apples in the fridge?4. He will be away for long next year. (改为否定句)He be away for long next year.5. You had better tell him the news. （改为否定句）You had better _ _ him the news.6David usually plays football at school.（改为一般疑问，并作否定回答）_7Turn off the radio, please.（改为否定句） turn off the radio, please.8. We need some masks.(改成否定句)9. The boy is standing on the mans shoulders.(改为一般疑问句)10. Su Hai and Su Yang live in a new house.（改为一般疑问句，并作肯定否定回答）_11.I put a book on my head. (改成否定句)_12. They are singing in the classroom .(改成一般疑问句)_
