英语肯定句改否定句的方法

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英语肯定句改为否定句、陈述句改为一般疑问句的方法和技巧

英语肯定句改为否定句、陈述句改为一般疑问句的方法和技巧

英语肯定句改为否定句、陈述句改为一般疑问句的方法和诀窍㈠肯定句变为否定句的方法——⑴加;⑵变⑴“加”——是指加not。

加not的规则是:原句中有“情助be”时则直接在“情助be”后加not(not可与“情助be”缩写);原句中没有“情助be”时则需要另加助动词do/does/did, 然后在助动词do/does/did后加not(not可与助动词do/does/did缩写)。

助动词do和does用于一般现在时,did用于一般过去时。

⑵“变”——是指变化某些需要变化的词(因为某些词只能用于肯定句或只能用用于否定句)。

如:some→any(someone→anyone,something→anything,somewhere→anywhere);and→or;too/also→either[´aiðə; ´i: ðə];a lot of→many/much等。

另外,使用助动词does/did帮助否定时,原来的谓语动词要恢复原形。

例:1)He can swim. →He can’t swim.2)He will(将,要)swim. →He won’t(will not) swim.3)He is a good swimmer. →He isn’t a good swimmer.4)I have some English books. →I don’t have any English books.5)She can sing and dance. →She can’t sing or dance.6)Li Lei’s father has a lot of money. →Li Lei’s father doesn’t have much money.7)He went to Shanghai last week. →He didn’t go to Shanghai last week.说明:大多数英语肯定句改为否定句都符合上述规则,但也有一些特殊的情况不符合上述规则,在以后的学习中会学到,要注意积累。

英语肯定句变否定句的方法

英语肯定句变否定句的方法

一、首先,要看肯定句中是否有情态动词,如果有情态动词,直接在情态动词后面加not即可,同时句中如果有some,some就要变成any。

举例如下:1、肯定句:Mike can help you solve the problem.译文:迈克可以帮你解决那个问题。

否定句:Mike can't help you solve the problem. (can't=can not)译文:迈克不能帮你解决那个问题。

2、肯定句:You should lend some money to Mary.译文:你应该借给玛丽一些钱。

否定句:You shouldn't lend any money to Mary. (shouldn't=should not)译文:你不应该借钱给玛丽。

二、如果肯定句中没有情态动词,那就要看句中有无be动词的相应形式,如果有,直接在be动词后面加not,句中有some,some变any。

举例如下:1、肯定句:I am an English teacher.译文:我是一名英语老师。

否定句:I‘m not an English teacher.译文:我不是一名英语老师。

2、肯定句:There are some books on the desk.译文:书桌上有一些书。

否定句:There aren't any books on the desk.译文:书桌上没有书。

三、如果肯定句中既没有情态动词,也没有be动词,那么就要用相应的助动词加上not来变换,句中有some,some变any。

举例如下:1、肯定句:She likes helping others.译文:她喜欢帮助别人。

否定句:She doesn't like helping others.译文:她不喜欢帮助别人。

2、肯定句:They have some apples.译文:他们有一些苹果。

英语肯定句改否定句口诀

英语肯定句改否定句口诀

英语肯定句改否定句口诀在英语语法中,人们经常需要将肯定句改为否定句,或者相反。

这是学习英语的一个重要部分,因为能够灵活运用肯定句和否定句的转换,可以使我们的表达更加丰富多样。

本文将为大家介绍一些英语肯定句改否定句的口诀,帮助我们更好地掌握这个技巧。

一、一般句式肯定改否定一般句式的肯定句改为否定句,只需要在动词前面加上"do not"或"does not"即可。

例如:He plays basketball every day.(他每天打篮球。

)→ He does not play basketball every day.(他不是每天打篮球。

)They eat lunch in the cafeteria.(他们在食堂吃午餐。

)→ They do not eat lunch in the cafeteria.(他们不是在食堂吃午餐。

)二、be动词肯定改否定be动词是英语中最常用的动词之一,其肯定形式为"is"、"am"、"are",改为否定形式只需在其后加上"not"即可。

例如:I am a teacher.(我是一名教师。

)→ I am not a teacher.(我不是一名教师。

)They are students.(他们是学生。

)→ They are not students.(他们不是学生。

)三、情态动词肯定改否定情态动词在英语中也占有重要地位,它们有自己的肯定形式和否定形式。

要将肯定形式转化为否定形式,只需在情态动词后面加上"not"即可。

例如:She can swim very well.(她会游泳得很好。

)→ She cannot swim very well.(她游泳不很好。

)You should listen to your parents.(你应该听父母的话。

肯定句改否定句英语

肯定句改否定句英语

肯定句改否定句英语
一、肯定句改否定句的规则
1.在动词前面加not。

2.有be动词,将be动词提前改成否定形式。

3.有情态动词,将情态动词提前改成否定形式。

4.没有助动词或情态动词,需要添加助动词do或does,然后将动词改为原
型。

二、肯定句改否定句的例子
1.I like English.(我喜欢英语。


否定句:I don't like English.
2.He is a student.(他是一个学生。


否定句:He is not a student.
3.We can swim.(我们可以游泳。


否定句:We cannot swim.
4.They have a book.(他们有一本书。


否定句:They do not have a book.
5.My mother is a doctor.(我的妈妈是一位医生。


否定句:My mother is not a doctor.
6.The sun rises in the east.(太阳从东方升起。


否定句:The sun does not rise in the east.
7.It was Sunday yesterday.(昨天是星期天。


否定句:It was not Sunday yesterday.。

肯定句改为否定句的方法

肯定句改为否定句的方法

肯定句改为否定句的方法
将肯定句改为否定句的方法包括以下几种:
1. 在句子前面加上否定词not或no。

例如,She is happy.(肯定句)可以改为She is not happy.(否定句)
2. 在句子前面加上否定词never或no one。

例如,He always helps others.(肯定句)可以改为He never helps others.(否定句)
3. 使用否定词n't。

例如,They can swim.(肯定句)可以改为They can't swim.(否定句)
4. 使用否定词的缩写形式。

例如,I am not going.(肯定句)可以改为I'm not going.(否定句)
5. 使用否定副词或句子的否定形式来对句子进行修饰。

例如,He is very smart.(肯定句)可以改为He is not very smart.(否定句)需要注意的是,在改变句子时,除了在动词前添加否定词或词组外,还需根据句子结构调整其他部分的词语位置和形式。

英语肯定句变否定句的方法

英语肯定句变否定句的方法

英语肯定句变否定句的方法摘要:一、英语肯定句变否定句的常用方法二、具体转换步骤和实践示例正文:英语肯定句和否定句在表达上有着明显的区别。

在英语中,否定句通常用来表示对某个陈述或观点的否认。

要将从肯定句转换为否定句,有以下几种常用方法。

首先,在句子前加“no”,这是最直接的方法。

例如,原句为“She is a teacher.”,转换为否定句就是“She is not a teacher.”。

其次,使用助动词“isn"t”、“aren"t”、“wasn"t”、“weren"t”等来替换原句中的动词。

例如,“They are playing soccer.”变为“They aren"t playing soccer.”接下来,我们可以利用“don"t”、“doesn"t”、“didn"t”等助动词替换疑问句中的动词。

例如,“He likes pizza.”变为“He doesn"t like pizza.”此外,还可以用“not...until...”的结构来表示否定。

例如,“I will go until it rains.”可以转换为“I will not go until it rains.”最后,需要注意的是,在转换过程中,要确保句子的语法结构和意思保持不变。

例如,“He has finished his homework.”转换为否定句就是“He hasn"t finished his homework.”总之,掌握以上方法,就可以轻松地将英语肯定句转换为否定句。

在实际应用中,根据不同的语境和句子结构,选择合适的方法进行转换,使句子更加丰富和生动。

英语肯定句改否定句

英语肯定句改否定句

1、You can use this dictionary〔.改为否认句〕You cannot〔can’t〕 use this dictionary.2、There is some wonderful news in today〔’改s为paper否认.句〕There are any wonderful news in today’ s paper.3、They play football on the playground.〔改为一般疑问句,并作肯定答复〕Do they play football on the playground?Yes, they do.4、This is my ID card〔.改为一般疑问句〕Is this your ID card?5、The schoolbag is under the desk〔.改为一般疑问句,并作肯定答复〕Is the schoolbag under the desk?Yes,it is.一、肯定句改否认句的方法:1、在 be 动词后加 not 。

如: is not , are not , am not , was not , were not ;2、在 can,should , will 等后加 not 。

如:cannot ,should not , will not ;3、上述都没有的,在动词前加助动词否认形式 don’t/doesn ’t/didn ’t 。

4、 some 改成 any。

如: I am a girl.→ I am not a girl.You are a student.→You are not a student.→Y ou aren ’t a student.This is Tom ’s bag,→ This is not Tom’s bag.→This isn ’t Tom ’ s bag.答题方法是;否认词no t在be后边。

肯定句变为否定句的方法一般疑问句的回答

肯定句变为否定句的方法一般疑问句的回答

课时七:肯定句变为否定句的方法一般疑问句的回答1)肯定句变为否定句的方法把肯定句改成否定句分以下情况:1、句中有be动词的,在be动词后加not;2、句中有情态动词的(can ,should,must ,would),在情态动词后面加not;3、句中没有be动词和情态动词的,在动词前加d on’t或doesn’t ;①句中动词为原形的,加d on’t.如: I like apples. →I do n’t like apples.②句中动词为三单式的,加does n’t,并将三单式的动词还原成原形。

如:He likes apples.→ He does n’t like apples.③时态为过去时的,要加didn’t 而且动词过去式要改为原形,例:I went to school yesterday .→I didn’t go to school yeaterday .4.肯定句中的some在否定句中应改为any如:There are some students in the classroom.→ There are not any students in the classroom.2) 一般疑问句的回答a) Is Jim a student? b) Can I help you?c) Does she like salad? d) Do they watch TV?e) Is she reading?肯定回答: a) Yes, he is. b) Yes, you can. c) Yes, she does. d) Yes, they do. e) Yes, she is.否定回答: a) No, he isn’t. b) No, you can’t. c) No, she doesn’t. d) No, they don’t. e) No, she isn’t.由Be动词来问,也由Be 动词来回答be : am is areAm I a teacher? Yes,you are . No,you aren't.Is he Tom? Yes,he is . No,he isn't.Is she your friend? Yes,she is . No,she isn't.Is Lucy 8 years old ? Yes,she is. No,she isn't.Is there a book on the desk? Yes,there is .No,there isn'由助动词do, does, did, will提问,也用它们来回答Do you have a book? Yes,I have. No, I haven't.Does he have a pen? Yes,he does. No,he doesn't.Does it like to sleep? Yes,it does. No,it doesn't.Did you lost your way? Yes,I did. No,I didn't.Will he go to the zoo? Yes,he will. No,he Won't.Will you go home? Yes,I will. No,I Won't.情态动词,用can 问,也用它来答Can you sing? Yes,I can. No,I can't.Can he swim? Yes,he can. No,he can't.特殊情况Must I go to school? Yes,you have to. No,you needn't.课堂练习将下列各句改成否定句1、Tom’s brother is walking in the park.________________________________2、His father is driving a bus.__________________________________________3、 The students of Class 5 are cleaning the classroom._________________________________________________4、Their dog is playing in the room.______________________________________5、Tom and Mary are friends._______________________________6、 These buses are new._________________________7、 There are some books in the bookcase.______________________________________8、There is a banana in the box._____________________________9、I’m a student._______________________把下列句子改写为否定句、一般疑问句及肯定、否定回答1. His father is an English teacher.2. These cats are crying.3. They can swim. I must do my homework now4. I like reading English.5. His sister goes to school on foot.6. Her birthday is on the twentieth of November.7. Mrs. Li and Kitty are in a big shop.8. Kitty is wearing her new uniform.9. Mrs. Li and Kitty watch TV at night.10. I do my homework after school.课后练习把下列句子改写为否定句、一般疑问句及肯定、否定回答1. The boy does some housework at home.2. We are from China.3. Jim has some books.4. I have many books about English.5. My aunt often watches TV.6. There are 5 students in the classroom.7. My parents can play tennis.8. They are my grandparents.9. He is watering the flowers in the park.10. Gina wants a cup of coffeeAre you a student? Are you students? Is that a pencil? Is this a pen? Is it a cat? Does he have an eraser? Did they go swimming? Will they go home? Did he go to school? Can she draw? Can they dance?。

肯定句变否定句英语

肯定句变否定句英语

肯定句变否定句英语如何将肯定句变成否定句?在英语语法中,肯定和否定的概念是非常重要的。

在我们的日常交流和写作中,正确地使用否定句是非常必要的,因为很多时候否定句的含义比肯定句容易被人理解。

在下面的文章中,我们将详细探讨如何将肯定句变成否定句。

1. 去掉肯定词一般来说,将肯定句变成否定句的最简单的方法就是去掉肯定词。

肯定词包括但不限于:some, is, am, are, were, was, has, have, had, will, can, may等等。

这样可以改变句子的含义并将它转变为否定句。

例如:肯定句: She is kind.否定句: She is not kind.肯定句: They have read this book.否定句: They have not read this book.肯定句:I can swim.否定句:I cannot swim.2. 使用否定词另一种将肯定句变成否定句的方法是添加否定词。

常用的否定词包括但不限于:no, not, never, nothing, neither等等。

使用这些否定词能给句子带来否定的意义。

例如:肯定句: He asked me something.否定句: He didn’t ask me anything.肯定句: He always comes late.否定句: He never comes early.肯定句: I like coffee.否定句: I don’t like coffee.3. 使用相反的形容词或副词在有些情况下,我们可以使用相反的形容词或副词来将肯定句变成否定句。

例如,将“happy”换成“unhappy”,将“fast”换成“slow”等等。

例如:肯定句:She is beautiful.否定句:She is not ugly.肯定句:He is tall.否定句:He is not short.肯定句:He runs fast.否定句:He does not run slowly.总之,在英语语法中,正确使用肯定句和否定句非常重要。

肯定句变为否定句的方法一般疑问句的回答

肯定句变为否定句的方法一般疑问句的回答

肯定句变为否定句的方法;一般疑问句的回答1)肯定句变为否定句的方法把肯定句改成否定句分以下情况:1、句中有be动词的,在be动词后加not;2、句中有情态动词的(can ,should,must ,would),在情态动词后面加not;3、句中没有be动词和情态动词的,在动词前加d on’t或doesn’t;①句中动词为原形的,加d on’t.如: I like apples. →Ido n’t like apples.②句中动词为三单形式的,加does n’t,并将三单式的动词还原成原形。

如:He likes apples.→ He does n’t like apples.4.肯定句中的some在否定句中应改为any如:There are some students in the classroom.→ There are not any students in the classroom.2) 一般疑问句的回答a) Is Jim a student? b) Can I help you?c) Does she like salad? d) Do they watch TV?e) Is she reading?肯定回答: a) Yes, he is. b) Yes, you can.c) Yes, she does. d) Yes, they do. e) Yes, she is.否定回答: a) No, he isn’t. b) No, you can’t.c) No, she does’t. d) No, they don’t.e) No, she isn’t.由Be动词来问,也由Be 动词来回答be : am is areAm I a teacher? Yes, you are . No, you aren't.Is he Tom? Yes, he is. No, he isn't.Is she your friend? Yes, she is . No, she isn't.Is Lucy 8 years old? Yes, she is. No, she isn't.由助动词do, does提问,也用它们来回答Do you have a book? Yes, I have. No, I haven't. Does he have a pen? Yes, he does. No, he doesn't. Does it like to sleep? Yes, it does. No, it doesn't.情态动词,用can 问,也用它来答Can he swim? Yes, he can. No, he can't. 把下列句子改写为否定句、一般疑问句并做肯定、否定回答1. His father is an English teacher.(否定句)His father is not an English teacher.(一般疑问句)Is his father an English teacher?Yes, he is. No, he isn’t.2. They can swim.(cannot)They cannot(can’t) swim.Can they swim? Yes, they can. No, they can’t.3. I like reading English.I don’t like reading English.Do you like reading English? Yes, I do. No, I don’t.4. His sister goes to school on foot.(否定句)His sister doesn’t go to school on foot.(一般疑问句)Does his sister go to school on foot? Yes, she does. No, she doesn’t.5. Mrs Li and Kitty watch TV at night.Mrs Li and Kitty don’t watch TV at night.Do Mrs Li and Kitty watch TV at night?Yes, they do. No, they don’t.6. I do my homework after school.I don’t do my homework after school.Do you do your homework after school?Yes, I do. No, I don’t.课后练习把下列句子改写为否定句、一般疑问句及肯定、否定回答1. The boy does some housework at home.2. We are from China.3. Jim has some books.4. I have a football book.5. My aunt often watches TV.6. My parents can play ping-pong.7. They are my grandparents.8. Gina wants a cup of coffeeAre you a student? Are you students? Does he look cool?Can she draw? Can they dance?。

肯定句变否定句的规则

肯定句变否定句的规则

肯定句变否定句的规则在英语语法中,将肯定句变成否定句的规则是非常重要的。

在实际的英语交流中,有许多时候需要使用否定句来表达自己的意图,因此掌握这个规则是至关重要的。

在英语中,将肯定句变成否定句有几种方法。

以下是几种最常用的方法:1.将be动词或动词的辅助动词not加在肯定句中。

例如:肯定句:She is happy.否定句:She is not happy.2.使用否定词,如never,not,hardly,scarcely,little 等。

例如:肯定句:I always drink coffee in the morning.否定句:I never drink coffee in the morning.3.使用两个否定词表达肯定的含义。

例如:肯定句:I have nothing to do.否定句:I don't have nothing to do.(=I have something to do.)需要注意的是,否定句中的句子结构常常会发生变化。

例如:肯定句:He speaks English well.否定句:He does not speak English well.在这个例子中,主语和动词之间插入了动词的辅助动词does。

这是因为在一般现在时和一般过去时中,要使用动词的辅助动词来表示否定意义。

此外,某些词语的否定形式也要格外留意。

例如:肯定句:I have some money.否定句:I have no money.肯定句:There is a book on the desk.否定句:There is no book on the desk.总之,在学习英语语法时,将肯定句变成否定句的规则是必不可少的一部分。

只有熟练地掌握了这些规则,才能在实际的英语交流中更自如地表达自己的意图。

(完整版)六年级英语肯定句改否定句

(完整版)六年级英语肯定句改否定句

一、肯定句改否定句的方法:1、在be动词后加not。

如:is not , are not ,am not, was not, were not;2、在can,should, will等后加not。

如:cannot,should not, will not;3、上述都没有的,在动词前加助动词否定形式don’t/doesn’t/didn’t。

4、 some 改成any。

如: I am a girl. → I am not a girl.You are a student. →You are not a student.→You aren’t a student.This is Tom’s bag, → This is not Tom’s bag.→ This isn’t Tom’s bag.答题方法是;否定词not在be后边。

二、肯定句改一般疑问句的方法:1、把be动词放在句首,剩下的照抄,(some 改成any,I改成you,my改成your,)句点改成问号。

2、把can,shall, will等放到句首,剩下的照抄,(some 改成any,I改成you,my改成your,)句点改成问号。

3、上述都没有的,在句首请助动词Do/Does/Did帮忙,剩下的照抄,(some 改成any,I改成you,my 改成your,)句点改成问号。

注意:句首的第一个字母要大写,句尾标点应为“?”。

如:I am in Class 6. →Are you in Class 6?You are from America. →Are you from America? It is an orange. →Is it an orange?答题方法是:要想提问,be提前,句末“?”别忘了。

4、就一般疑问句回答一般疑问句有两种回答,即:肯定回答和否定回答。

其中,肯定回答用yes,否定回答用no。

语句顺序为:Yes + 主语+ am /is/ are/was/were.|can.|do/does/did|; No + 主语+ am not/ isn’t/ aren’t/wasn't/weren't.|can't.|don't/doesn't/didn't |.。

英语肯定句改否定句

英语肯定句改否定句

1、You can use this dictionary.(改为否定句)You cannot(can’t)use this dictionary.2、There is some wonderful news in today’s paper.(改为否定句)There are any wonderful news in today’s paper.3、They play football on the playground.(改为一般疑问句,并作肯定回答)Do they play football on the playground?Yes, they do.4、This is my ID card.(改为一般疑问句)Is this your ID card?5、The schoolbag is under the desk.(改为一般疑问句,并作肯定回答)Is the schoolbag under the desk?Yes,it is.一、肯定句改否定句的方法:1、在be动词后加not。

如:is not ,are not ,am not,was not,were not;2、在can,should,will等后加not。

如:cannot,should not,will not;3、上述都没有的,在动词前加助动词否定形式don’t/doesn’t/didn’t。

4、some 改成any。

如:I am a girl. →I am not a girl.You are a student. →You are not a student.→You aren’t a student.This is Tom’s bag, →This is not Tom’s bag.→This isn’t Tom’s bag.答题方法是;否定词no t在be后边。

二、肯定句改一般疑问句的方法:1、把be动词放在句首,剩下的照抄,(some 改成any,I改成you,my改成your,)句点改成问号。

英语肯定句改为否定句的方法

英语肯定句改为否定句的方法

英语肯定句改为否定句的方法
将英语肯定句改为否定句,需要遵循以下步骤:
1. 找到句中的动词。

2. 如果动词是be动词(即am, is, are),直接在其后加not。

3. 如果动词是助动词(即do, does, did),在其后加not。

4. 如果动词是实意动词,则需要借助助动词do, does, did,在其后加not。

5. 如果有情态动词(如must, can等),则在情态动词后加not。

6. 如果有否定词如never、no等,则不需要再加否定词。

7. 如果有already、yet等副词,需要变为yet或still。

8. 如果有some,需要变为any。

以下是一些具体的例子:
1. 肯定句:I am a student.
否定句:I am not a student.
2. 肯定句:She does her homework every day.
否定句:She doesn't do her homework every day.
3. 肯定句:He has a cat.
否定句:He doesn't have a cat.
4. 肯定句:They will come here.
否定句:They won't come here.
5. 肯定句:We must finish our work today. 否定句:We must not finish our work today.。

英语肯定句改为否定句口诀

英语肯定句改为否定句口诀

英语肯定句改为否定句口诀
以下是一些常见的英语肯定句改为否定句的口诀,帮助您快速掌握。

1.一般现在时
-肯定句:主语+动词原形
-否定句:主语+do/does not+动词原形
2.一般过去时
-肯定句:主语+动词过去式
-否定句:主语+did not+动词原形
3.一般将来时
-肯定句:主语+will+动词原形
-否定句:主语+will not/won't+动词原形
4.现在进行时
-肯定句:主语+am/is/are+动词-ing形式
-否定句:主语+am/is/are not+动词-ing形式
5.现在完成时
-肯定句:主语+have/has+过去分词
-否定句:主语+have/has not+过去分词
6.过去进行时
-肯定句:主语+was/were+动词-ing形式
-否定句:主语+was/were not+动词-ing形式
7.过去完成时
-肯定句:主语+had+过去分词
-否定句:主语+had not+过去分词
8.情态动词
-肯定句:主语+情态动词+动词原形
-否定句:主语+情态动词+not+动词原形
9.be动词(一般现在时)
-肯定句:主语+am/is/are
-否定句:主语+am/is/are not
10.be动词(一般过去时)
-肯定句:主语+was/were
-否定句:主语+was/were not
这些口诀可以帮助您快速记住肯定句改为否定句的基本规则。

然而,需要注意的是,有些特殊情况下,否定形式可能会有其他变化或使用不同的词汇。

因此,在具体应用时,仍需结合具体语境和语法规则进行判断和运用。

英语句型转换之一肯定句变否定句的方法技巧

英语句型转换之一肯定句变否定句的方法技巧

英语句型转换之一肯定句变否定句的方法技巧转换句型从肯定句到否定句,可以使用以下方法和技巧:
1. 在动词前加上否定副词:例如,I can swim.(我会游泳。

)变为
I cannot swim.(我不会游泳。


2. 使用 do not/does not/did not 加上动词的原形:例如,He likes coffee.(他喜欢咖啡。

)变为 He does not like coffee.(他不喜欢咖啡。


3. 在助动词前加上 not:例如,She is watching TV.(她在看电视。

)变为 She is not watching TV.(她不在看电视。


4. 将 be 动词转换为它的否定形式:例如,They are here.(他们在这里。

)变为 They are not here.(他们不在这里。


5. 在句子中使用反义词或否定概念的词来表示否定:例如,The weather is good.(天气很好。

变为 The weather is not bad.(天气不差。

这些是转换从肯定句到否定句的常见方法和技巧。

根据句子的不同结构和语境,可能需要使用不同的方法来转换句子。

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肯定句改否定句的发:
1.看句子中有没有系动词或情态动词,如果有,就直接在系动词或情态动词后加not。

例如:They were busy yesterday.(他们昨天很忙),句子中有系动词were,改为否定句时就直接在系动词were 后加not,改为They were not busy yesterday.(他们昨天不忙)。

再例如You should stand here(你应该站在这儿),改为否定句,在情态动词should后加not,改为You should not stand here.(你不应该站在这儿)
2.句子中如果没有系动词或情态动词,就在实意动词前(主语后)don´t或doesn´t 或didn´t(根据实意动词的形态确定),实意动词必须变回原形。

例如:The children feel happy.(孩子们感到快乐),动词是原形形式的feel,所以在动词前加don´t,改为否定句:The children don´t feel happy.(孩子们感到不快乐)
再例如:She takes up the phone(她拿起电话),动词是单三形式的takes,所以在动词前加doesn´t,同时必须把句子中的takes变回原形take,改为否定句:She doesn´t take up the phone(她没拿起电话)
再例如:He told me a story(他给我讲了一个故事),动词是过去式形式的told,所以在动词前加didn´t,同时必须把句子中的told变回原形tell,改为否定句:He didn´t tell me a story(他没有给我故事)。

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