七年级英语上否定句及一般疑问句知识点

句型转换肯定句变否定句及一般疑问句一、肯定句变否定句1、含有be动词的否定句规则：在be动词后+not. （ is not可缩写成 isnt ；are not可缩写成 arent 但 am 与not不可缩写）eg: （1）肯定句： I am a student. 我是一名 学生否定句： I am not a student. 我不是一名学生（2）肯定句： She is my sister. 她是我的妹妹。否定句： She isnt my sister. 她不是我的妹妹。（3）肯定句： They are my parents. 他们是我的父母否定句： They arent my parents. 他们不是我的父母活学活用将下列句子变为否定句1. The keys are on the table._2. This is my sister._3. A computer game is in the school library._4. I am in China now._2、含情态动词的否定句 规则：在情态动词后+ not，必要时可缩写。（比如： can not 可缩写成cant must not 可缩写成mustnt ）eg: （1）肯定句：I can spell “English”. 我能拼写English”。否定句：I cant spell “English”. 我不能拼写English”.（2）肯定句：I must find it. 我必须找到它否定句：I mustnt find it.我禁止找到它。活学活用将下列句子变为否定句1. You can eat well for breakfast._2. I can go to school on Monday._3. She can watch TV on Saturday._3、含有实义动词的句子的否定句构成（1）第三人称单数做主语。（he、she、it或表示单个人或物的第三人称名词）规则：要在行为动词前加上助动词doesnt，然后将动词恢复原形。eg ： 肯定句：He has a soccer ball. 他有一个足球。否定句：He doesnt have a soccer ball. 他有一个足球。（2）其它人称做主语规则：在行为动词前加dont ，句子中的行为动词用原形。eg: 肯定句： They like bananas.他们喜欢香蕉。否定句：They dont like bananas.他们不喜欢香蕉。 注：（1）在变否定句时，如遇some应变any Here are some books. Here arent any books. 活学活用将下列句子变为否定句 1. I have some basketballs._ 2. We like bananas._ 3. Tom has a volleyball._ 4. I know youre your name._ 5. She wants to buy a hat._二、肯定句变一般疑问句1、含有be动词的句子变一般疑问句规则：把be动词提至句首,第一人称变第二人称，句末句号变问号。（I/we变成youMy/our变成your）（1）肯定句： I am a student. 我是一名 学生一般疑问句： Are you a student? 你是一名学生吗？（2）肯定句： She is my sister. 她是我的妹妹。一般疑问句： Is she your sister? 她是你的妹妹吗？（3）肯定句： They are my parents. 他们是我的父母一般疑问句： Are they your parents? 他们是你的父母吗？活学活用将下列句子变为一般疑问句1.The keys are on the table._2.This is my sister._3.A computer game is in the school library._4.I am in China now._2、含有情态动词的句子变一般疑问句规则：把情态动词提至句首,第一人称变第二人称，句末句号变问号。（I/we变成youMy/our变成your）eg: （1）肯定句： I can spell “English”. 我能拼写English”。一般疑问句： Can you spell “English”. 你能拼写English”吗？（2）肯定句： I must find it. 我必须找到它一般疑问句： Must you find it? 你必须找到它吗？活学活用将下列句子变为一般疑问句4. You can eat well for breakfast._5. I can go to school on Monday._6. She can watch TV on Saturday._3、含有行为动词的句子变一般疑问句变法（1）第三人称单数做主语规则：如果主语是单数第三人称，那么变成一般疑问句时，须在句首加助动词does，然后将动词恢复原形；eg ： 肯定句： He has a soccer ball. 他有一个足球。一般疑问句：Does he have a soccer ball?. 他有一个足球吗？（2）其它人称做主语如主语是其它人称，则须在句首加助动词do，动词仍是原形。eg: 肯定句： They like bananas.他们喜欢香蕉。一般疑问句：Do they like bananas?他们喜欢香蕉吗？ 注：（1）如句中有some ，变成一般疑问句时应变成any。（2）如果句中有第一人称的词，变成一般疑问句时须变成相应的第二人称。 比如：I变成you ，we变为you, my变为your, our变成your。eg: I have a new book. Do you have a new book? Here are some apples. Are here any apples?（3）一般疑问句的回答有肯定回答、否定回答两种，回答时用人称代词。eg: Is he a teacher？ Yes, he is Can he play baseball？ Yes ,he can No ,he cantDoes he watch TV every day？ Yes, he does. No, he doesnt. 活学活用将下列句子变为一般疑问句 1. I have some basketballs._ 2. We like bananas._ 3. Tom has a volleyball._ 4. I know youre your name._ 5. She wants to buy a hat._同义句转换1. This is a red sweater.= This coat is sweater.这是一件红色的毛衣。2. That is her ruler.=That ruler is hers. 那是他的尺子3. My favorite subject is English= English is my favorite subject=I like English best 我最喜欢的科目是英语 4. Whats your favorite subject( food, fruit, sport, color)?=What subject( food, fruit, sport, color) do you like best?你最喜欢什么学科？ 5. My mother buys me a dictionary.+ My mother buys a dictionary for me. 我的妈妈给我买了一本词典 6. My last name is Green = My family name is Green. 我姓Green.7. Whats your phone number? = Whats your telephone number? 你的电话号码是什么？8. Math is difficult.=math is not easy.数学很难。9. Its boring= Its not interestingfun. 它很无聊10. How much are the trousers?= Whats the price of the trousers? 裤子的价格是多少？11. What about=How about 12. Thanks for your help.=Thank you for helping me.感谢你的帮助13. Can I help you?= What can I do for you? 我能帮助你吗？14. Im OK= Im fine. 我很好 15. Im Gina= My name is Gina.我是吉娜。【模拟试题】（答题时间：15分钟）一. 把下列句子变成否定句。1、We are in Shenyang._2、They can play football. _3、He plays soccer ball well. _4、I am a new teacher. _5、Tom is at school. _6、There are some new books. _二. 把下列句子变为一般疑问句。1、He can speak English. （并否定回答）_2、Tom is a new student.（并肯定回答）_3、She plays the piano well.（并肯定回答）_4、We are Chinese.（并否定回答）_5、They like singing.（并肯定回答）_三、同义句转换1.IamOK.Thankyou.Im_.2.ImGrace._isGrace.3.Thisdeskisold.Thisis_desk.4.CanIhelpyou?_canIdo_you?5.Howmucharetheredsocks?_the_oftheredsocks?6.Whatsthepriceofthepants?_thepants?7.Thisismyhat._mine四、句型转换1The girl can speak English .( 改为一般疑问句 )_ _ the girl _ _ English ?2Tom often studies in the library . ( 改为否定句 )Tom _ _ often _ _ in the library .3. John goes to school at7:00 in the morning. (改为否定句)John _ _ to school at 7:00 in the morning.4. Peter does his homework at 7:00. (改为一般疑问句)_ Peter _ his homework at 7:00?5. Lucy can play baseball well. (改为否定句)Lucy _ _ baseball well.6There are someEnglish friends in our school. (改为一般疑问句)_ the