陈述句变疑问句和否定句.ppt

1、陈述句变一般疑问句和否定句步 骤,一、变一般疑问句,当句中谓语动词含有系动词（is/am/are/was/were）或者是情态动词（ can/may/must/should/would/could/will/shall/need ）时，应该先在该系动词或者情态动词直接提到句首，然后在句尾加“？” 当句中含有第一人称的代词时，在改为问句后应该改为与此相应的第二人称（系动词的变化）.,第一种情况：,注意：,I-you we-you my-your me-you our-your us-you myself-yourself ourselves-yourselves,1.We are all fro

2、m the USA. you all from the USA 2.I am listening to the music. you listening to the music 3.Tom is doing his homework at home. Tom doing his homework at home 4.The students will go to see the animals in the zoo next week. the students go to see the animals in the zoo next week 5.We should help each

3、other in the study . you help each other in the study,Are,?,Are,?,Is,?,Will,?,Should,?,第二种情况： 如果句中谓语动词既无系动词又无情态动词而是实义动词，则要用助动词do或者它的其他形式does/did，具体是把该助动词提到句首变为Do /Doed/Did. 其结构为： Do/Does/Did +主语 +V（原形）+其他 ？,1.He goes to the school on foot every day . he go to the school on foot every day 2.They walk

4、 to hospital to see their good friend ,Tom. they walk to hospital to see their good friend ,Tom 3.Tom and Jim get up at 6:30 a.m.every day. Tom and Jim get up at 6:30 a.m. every day,Does,?,Do,?,Do,?,一、变否定句,要看句中谓语动词是否有系动词（is /am/ are/was/were）或者情态动词 (can/may/must/ should/would/could/will/shall/need).

5、以上 两种情况只要符合其中之一，就在其系动词或 者情态动词后直接加not即可(也可以用其缩略式)。,第一种情况：,其具体结构为： 主语+系动词/情态动词+not /缩略式+V(原形) +其他。,注意：如果句中含有并列词and时，变为否定句 后要改为or。,1.The twins are watching TV now. The twins are not(arent) watching TV now. 2.They were in the front of the classroom. They were not(werent) in the front of the classroom. 3

6、.The child can play the piano very well. The child can not(cant)play the piano very well. 4.We students should help each other in study . We students should not(shouldnt) help each other in study.,第二种情况：,如果句中谓语动词既无系动词又无情态动词而是实义动词，则要用助动词do或者它的其他形式does/did+not(或者用其缩略式dont/doesnt/didnt）即可。,注意：如果句中含有并列词

7、and时，变为否定句 后要改为or。,其具体的结构为： 主语+do/does/did+not+v原形+其他。,1.We always go to school on foot every day. We always dont go to school on foot every day. 2.They went to the hospital to see their good friend, Tom. They didnt go to the hospital to see their good friend ,Tom. 3.My good friend has two eggs and a glass of milk in the morning before he goes t