七年级英语上否定句及一般疑问句知识点

1、学习必备欢迎下载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isn ； are not 可缩写成aren t但 am 与 not 不可缩写）eg: （ 1 ）肯定句：I am a stude nt.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 isntmy sister.她不是我的妹妹。（3）肯定句：They are my pare nts.他们是我的父母否定句：They arentmy pa

2、rents.他们不是我的父母活学活用将下列句子变为否定句The keys are on the table._This is my sister._A computer game is in the school library. I am in Chi na 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：cannot 可缩写成 can tmust not 可缩写成 mustn ）eg: （ 1 ）肯定句：lean spell “ En glish.我能拼写 En glish。”否定句：leantspell “English ”我不能拼写 English .

3、（2）肯定句：I must find it.我必须找到它否定句：I mustn tfind 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.I can go to school on Mon day._ 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doesn，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 do

4、esn h ave 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 don t，句子中的行为动词用原形。eg:肯定句：They like banan as.他们喜欢香蕉。否定句：They don t like bananas 他们不喜欢香蕉。注：（1）在变否定句时，如遇some应变anyHere are some books.Here aren t any books.12 3 42.3.学习必备欢迎下载活学活用将下列句子变为否定句1.1 have some basketballs._2. We like bananas._3. Tom has a voll

5、eyball._4. I know you re yourame._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 stude nt?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 pa

6、rents.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._4am in Chi na 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：lean spell “ En glish 我能拼写 En

7、glish 。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 Mon day._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

8、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 hehave a soccer ball?.他有一个足球吗？学习必备欢迎下载（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 banan as.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

9、, 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) 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。构成：be 动词/be 动词+notYes/No,人称代词+ - 情态动词/情态动词+not助动词 do 或 does/don或 doesn t eg:Is he a teacher？Yes, he isCan he play baseball？Yes ,he can No ,he cantDoes he watch TV ever

10、y 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 you re yourame._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

11、subject is English= English is my favorite subject=I like English best我最喜欢的科目是英语4. What s your favorite subject( food, fruit, sport, color)?=Whatsubject( 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 las

12、t name is Green = My family name is Green. 我姓 Green.7. What s your phone number? = What s your telephone 你的电话号码是什么？8. Math is difficult.=math is not easy.数学很难。9. It boring= Itn6t interestingfun. 它很无聊10. How much are the trousers?= What s the price oh e trousers?裤子的价格是多少？11. What about=How about12. T

13、hanks for your help.=Thank you for helping me.感谢你的帮助学习必备欢迎下载13. Can I help you?= What can I do for you? 我能帮助你吗？14. I m OK= I m fin 我很好15. I m Gina= My name is Gina 我是吉娜。学习必备欢迎下载【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

14、teacher.5、_ Tom is at school.6、_There are some newbooks._二. 把下列句子变为一般疑问句。1、_ He canspeak English.（并否定回答） _2、_ Tom is anew student.（并肯定回答） _3、 She plays the piano well.（并肯定回答） _4、_ We areChinese.（并否定回答） _5、_ They likesinging.（并肯定回答） _三、 同义句转换1.1 am OK. Thank you. I m_.2. I nGrace._is Grace.3. This de

15、sk is old. This is_desk.4. Can I help you? _ can I do_you?5. How much are the red socks?_the_of the red socks?6. What the price of the pants?_ the pants?7. This is my hat._mi ne四、 句型转换1.The girl can speak English .（改为一般疑问句）_ the girl_En glish ?2.Tom often studies in the library .（ 改为否定句 ）Tom_ofte n_

16、in the library .3. John goes to school at7:00 in the morning.（改为否定句 ）Joh n_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.6.There are someEnglish friends in our school.（改为一般疑问句 ）_ there_ En