小学be动词的用法及助动词_do.doc

1. 由连系am，is，are构成的句子：变一般疑问句时把am，is，are提到句子的前面，句尾用问号即可。变否定句时直接在am，is，are后面加not即可。例如： 肯定句:He is a student. 一般疑问句: Is he a student? 否定句: He is not a student. 反问句: He is a student, isnt he? He isnt a student, is he? 画线提问: 对he提问: Who is a student? 对 a student 提问: What is he? or What does he do? 2. 由情态动词can, may, should等构成的句子: 变一般疑问句时把can,may,提到句子的前面,句尾用问号即可.变否定句时直接在can,may,后面加not即可. 例如: 肯定句: She can swim. 一般疑问句: Can she swim? 否定句: She can not swim. 反问句: She can swim, cant she? She can not swim, can she? 画线提问: 对she提问: Who can swim? 对swim提问: What can she do? 3. 由行为动词构成的句子: 需要加助词do或does. 变一般疑问句时把do/does放在句子前面. 例如: 肯定句: They play football after school. 一般疑问句: Do they play football after school? 否定句: They dont (do not) play football after school. 反问句: They play football after school, dont they? They dont play football after school, do they? 画线提问: 对they提问: Who play football after school? 对play football提问: What do they do after school? 对after school提问: When do they play football? 1. 由连系am，is，are构成的句子：变一般疑问句时把am，is，are提到句子的前面，句尾用问号即可。变否定句时直接在am，is，are后面加not即可。例如： 肯定句:He is a student. 一般疑问句: Is he a student? 否定句: He is not a student. 反问句: He is a student, isnt he? He isnt a student, is he? 画线提问: 对he提问: Who is a student? 对 a student 提问: What is he? or What does he do? 2. 由情态动词can, may, should等构成的句子: 变一般疑问句时把can,may,提到句子的前面,句尾用问号即可.变否定句时直接在can,may,后面加not即可. 例如: 肯定句: She can swim. 一般疑问句: Can she swim? 否定句: She can not swim. 反问句: She can swim, cant she? She can not swim, can she? 画线提问: 对she提问: Who can swim? 对swim提问: What can she do? 3. 由行为动词构成的句子: 需要加助词do或does. 变一般疑问句时把do/does放在句子前面. 例如: 肯定句: They play football after school. 一般疑问句: Do they play football after school? 否定句: They dont (do not) play football after school. 反问句: They play football after school, dont they? They dont play football after school, do they? 画线提问: 对they提问: Who play football after school? 对play football提问: What do they do after school? 对after school提问: When do they play football? 根据句后括号内的要求，填入句中所缺的词： 1.I know the answer.(一般疑问句) _ _ know the answer? 2.We can see some birds.(一般疑问句) _ _ see _ birds? 3.There is a computer in my house.(一般疑问句) _ _ a computer in house? 4.There are some flowers on the teachersdesk.(一般疑问句) _ _ _ flowers on the teachersdesk? 5.There are some apples on the tree.(否定式) There _ _ _ apples on the tree. 6.I think he is very old.(否定句) I _ think he _ very old. 7.Please colour it green.(否定句) _ _ colour it green. 8.We can speak good English.(变否定句) We _ _ speak good English. 9.Thank you for helping me.(同义句) Thank you for _ _ . 10.There arent any pears in thebox.(同义句) There are _ pears in the box. 11.Whose are these clothes?(同义句) _ _ are these? 12.Let me look at your book.(同义句) Let me _ _ _ _ your book. 13.Her sweater is red.(对划线部分提问) _ _ is her sweater? 14.My pencils are in the pencil-box.(对划线部分提问) _ _ your pencils? 15.I get up at six every day.(对划线部分提问) _ _ do you get up every day? 16.There are fifty students in my class.(对划线部分提问) _ _ students are there in your class? 17.These are cars.(用buses改写成选择疑问句) Are these cars_ _ ? 18.The book is in my schoolbag.(变否定疑问句) _ the book in your school-bag? 19.Two boys are in our house.(改为there be句型) _ _ two boys in our house. 20.Cant you find the map?(作肯定回答) _ ,I_ . 参考答案： 1.Do you 2.Can you,any 3.Is there,your 4.Are there any 5.are not any 6.dont,is 7.Please dont 8.can not 9.your help 10.no 11.Whose clothes 12.have a look at 13.What colour 14.Where are 15.What time 16.How many 17.or buses 18.Isnt 19.There are 20.Yes,can一、变否定句时相关词的改变 肯定句变否定句时，除将谓语变为否定式外，句中其他词语也可能随之改变，如将some改为any，too和also改为either，already改为yet，and改为or等：There are some birds in the tree. 树上有些鸟。There arent any birds in the tree. 树上没有鸟。He likes the girl, too. 他也喜欢这个女孩。He doesnt like the girl, either. 他也不喜欢这个女孩。We have already seen the film. 我们已看过这部电影。We have not seen the film yet. 我们没有看这部电影。He likes singing and dancing. 他喜欢唱歌和跳舞。He doesnt like singing or dancing. 他不喜欢唱歌也不喜欢跳舞。二、不变谓语动词而变其他词语有时将肯定句变为否定句时，不改变谓语而改变其他词语：Both of us went there. 我们两人都去了那儿。Neither of us went there. 我们两人都没去那儿。Both Jim and Mary can sing this song. 吉姆和玛丽都会唱这首歌。Neither Jim nor Mary can sing this song. 吉姆和玛丽都不会唱这首歌。All of the books are worth reading. 所有这些书都值得读。None of the books are worth reading. 所有这些书都不值得读。三、部分否定与完全否定比较以下句子：All of us laughed when we heard it. 听到这事时我们都笑了。(肯定句)All of us didnt laughed when we heard it. 听到这事时我们并未都笑。(部分否定)Not all of us laughed when we heard it. 听到这事时我们并未都笑。(部分否