陈述句变一般疑问句_肯定句变否定句.ppt

,陈述句变一般疑问句肯定句变否定句,1.什么是一般疑问句？,一般疑问句用于对某一情况提出疑问，通常可用yes或no来回答，读时用升调。,2.怎样把陈述句变成一般疑问句？,例：This is your pencil.这是你的铅笔。,Is this your pencil?这是你的铅笔吗？,见了be和can快快提上前be动词是否变is/am/are由后面的来决定。can的变化最简单，所有人称都用can。,英语陈述句变一般疑问句口诀：一般疑问句，变换并不难。先要看动词，情况分两种。,动词为实义，do和does上前线。单三人称用does,动词一定要还原。其他人称都用do。第一人称变第二。原句首字母变小写，切记句号变问号！,一提二改三问号！,一加二改三问号！,把句子中的be动词提前到句首。Be动词包括am is are。,练习题：,1.You are a student.2.She is a university student.3.He is a principle.4.They are good friends.5.There is a pencilcase in the schoolbag.6.There are many children in the park.,Are you a student?,Is she a university student?,Is he a principle?,Are they good friends?,Is there a pencilcase in the schoolbag?,Are there any children in the park?,例：He can go with us.他能跟我们一起去。,Can he go with us?他能跟我们一起去吗？,把句子中的情态动词提前到句首。句子中的情态动词包括can may must。,练习题：,She can play basketball.I may help you.He can sweep the floor.I must find my pen.,Can she play basketball?,May I help you?,Can he sweep the floor?,Must you find your pen?,例：You like singing.你喜欢唱歌。,Do you like singing?你喜欢唱歌吗？,Jim likes collecting stamps.吉姆喜欢集邮。,Does Jim like collecting stamps?吉姆喜欢集邮吗？,如果句子中没有be动词或情态动词，就要在句首加助动词帮助其变成一般疑问句。主语是一二人称及复数人称时加Do;主语是第三人称单数形式加Does。加了Does后句子中原本的动词三单形式要还原。,练习题：,1.You have a friend.2.He goes to school by bus.3.She likes apples.4.They live in the country.5.My friend lives in Shanghai.,Do you have a friend?,Does he go to school by bus?,Does she like apples?,Do they live in the country?,Does your friend live in Shanghai?,怎样把陈述句变成一般疑问句：把句子中的be动词提前到句首。Be动词包括am is are。把句子中的情态动词提前到句首。句子中的情态动词包括can may must。如果句子中没有be动词或情态动词，就要 在句首加助动词帮助其变成一般疑问句。主语是一二人称及复数人称时加Do;主语是第三人称单数形式加Does。加了Does后句子中原本的动词三单形式要还原。,注意：据点变问号。句中的第一人称变成相应的第二人称。some many 变 any 动词三单还原问题。,1.be动词的否定式 动词be根据不同的人称可以有am,is,are等不同形式，不管何种情况，构成否定式时，一律在其后加not：,否 定 句,也就是说，把肯定句变成否定句，就是在句子中的be动词后面加not。,例如：This is my basketball.They are their parents.,This is not my basketball.,They are not their parents.,练习题：,I am listening to music.Mike is a student.They are in the zoo.This is my sister.We are sweeping the floor.There are some flowers in the vase.,I am not listening to music.,Mike is not a student.,They are not in the zoo.,This is not my sister.,We are not sweeping the floor.,There are not any flowers in the vase.,2.情态动词的否定式 情态动词的否定式一般在其后加not构成：例如：I can finish the work in an hour.我能在1小时内完成这工作。I cant finish the work in an hour.我不能在1小时内完成这工作。You must go with us.你必须同我们一起去。You mustnt go with us.你不能同我们一起去。We should help them.我们应该帮助他们。We shouldnt help them.我们不必帮助他们。,也就是说，把肯定句变成否定句，就是在句子中的情态动词后面加not。,3.实意动词的否定式一般实意动词的否定式，应根据不同人称在实意动词之前加dont或doesnt：例如：I put a book on my head.我把书放到头上。I dont put a book on my head.我没把书放到头上。He works in a bank.他在一家银行工作。He doesnt work in a bank.他不是在银行工作。,也就是说，把肯定句变成否定句，就是在句子中的实意动词前面加dont或doesnt。一二人称复数人称加dont；三单人称加doesnt。,练习题：,They like taking the photo.Amy and Sarah live in Beijing.They sing a song together.We play basketball on Sundays.Mike likes listening to music.He needs some masks.,They dont like taking the photo.,Amy and Sarah dont live in Beijing.,They dont sing a song together.,We dont play basketball on Sundays.,Mike doesnt like listening to music.,He doesnt need some masks.,怎样把肯定句变成否定句：在句子中的be动词后直接加not。Be动词包括am is are。在句子中的情态动词后直接加not。句子中的情态动词包括can may must。如果句子中没有be动词或情态动词，就要 找句中的实义动词。在实义动词前加助动词的否定形式。主语是一二人称及复数人称时加Dont;主语是第三人称单数形式加Doesnt。加了Doesnt后句子中原本的动词三单形式要还原。,注意：some many 变 any 动词三单还原问题。,