肯定句变否定句
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。
肯定句变否定句+附答案
肯定句变否定句和一般疑问句习题一、实义动词He often goes to bed at ten.___________________________________________________________________ _____________________________________________________________________________________________ ________________ We do eye exercises every day.___________________________________________________________________ _____________________________________________________________________________________________ ________________二、系动词I am your friend.___________________________________________________________________ _____________________________________________________________________________________________ ________________ Her mother is a teacher.___________________________________________________________________ _____________________________________________________________________________________________ ________________ There are two books on the desk.___________________________________________________________________ _____________________________________________________________________________________________ ________________ 三、进行时The girl is standing at the station.___________________________________________________________________ _____________________________________________________________________________________________ ________________ The students are playing basketball on the playground.___________________________________________________________________ _____________________________________________________________________________________________ ________________ I am looking for a job recently.___________________________________________________________________ _____________________________________________________________________________________________ ________________ 六、情态动词You can use this dictionary.___________________________________________________________________ _____________________________________________________________________________________________ ________________ You need go tomorrow.___________________________________________________________________ _____________________________________________________________________________________________ ________________将下列陈述句变为否定句和一般疑问句。
肯定句变否定句口诀
肯定句变否定句的口诀如下:
改前面,加not;
含实义的词,直接变否定;
变be动词、助动词,not后面;
变have 与 do ,在前面加don't 。
如前所述,根据这个口诀,我们可以通过以下步骤将肯定句转变为否定句:
1. 若句子中没有情态动词,可直接在句子前加not,例如:He is a doctor.(他是一名医生。
)-> He is not a doctor.(他不是一名医生。
)
2. 若句子含有情态动词,直接将情态动词后面的动词原形变为动词的否定形式,例如:She can swim.(她会游泳。
)-> She cannot swim.(她不会游泳。
)
3. 当句子中含有be动词时,将be动词后面的动词原形变为动词的否定形式,并在be动词前加not,例如:They are happy.(他们很开心。
)-> They are not happy.(他们不开心。
)
4. 当句子中含有have或do时,将have或do变为其否定形式(has变为hasn't,do变为don't),例如:I have a pen.(我有一支钢笔。
)-> I don't have a pen.(我没有一支钢笔。
)
需要注意的是,对于助动词have和do,它们的否定形式是通过在前面加上don't来表示否定,而对于be动词来说,它的否定形式是通过在be动词后面加not来表示否定。
否定句及一般疑问句
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’t ;are not可缩成aren’t,但am 与not不可缩写)eg:肯定句:I am a student.否定句:I am not a student.肯定句:She is my sister.否定句:She isn’t my sister.肯定句:They are my parents.否定句:They aren’t my parents.2、含情态动词的否定句规则:在情态动词后+ not(can not 可缩写成can’t ,must not 可缩写成mustn’t )eg:肯定句:I can spell “English”.否定句:I can’’t spell “English”.English”.肯定句:I must find it.否定句:I mustn’t find it.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’t,然后将动词恢复原形。
eg :肯定句:He has a soccer ball.否定句:He doesn’t have a soccer ball.(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 bananas.否定句:They don’t like bananas.注:(1)在变否定句时,如遇some应变any Here are some books.Here aren’t any books.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)肯定句:I am a student.一般疑问句:Are you a student?肯定句:She is my sister.一般疑问句:Is she your sister?肯定句:They are my parents.一般疑问句:Are they your parents?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。
英语四个基本时态的 肯定句变否定句
_M_r_s_.__L_i_a_n_d__K_i_t_t_y__a_r_e__n_o__t_i_n__a_b__ig__s_h_o_p__. ________ .
8. He is crying(哭) under the tree.
____H__e_i_s_n__o_t__c_r_y_i_n_g_(__哭__)___u_n_d_e_r__t_h_e__t_r_e_e__. _____ .
9. His birthday is on the twentieth of November.
The old man doesn’t do morning exercises(早操) every morning.
23. We are from China.
_________W___e__a_r__e_n__’t__f__r_o_m___C__h_i_n_a__.________ .
24. He goes to the library(图书馆) on Sundays.
_____H_e__d_o_e_s_n_’_t__g_o_t_o__th__e_l_ib_r_a_r_y__o_n_S_u_n_d_a_y_s_.____ .
25. They have a class meeting every week.
_T_h__e_y_d__o_n_’t__h_a_v_e__a__c_l_a_s_s_m__e_e_t_i_n_g__e_v_e_r_y__w__e_e_k_. .
初中英语肯定句变否定句
初中英语肯定句变否定句
初中英语肯定句变否定句的方法有以下几种:
1. 直接在be 动词后加not。
如:He is a student. 变为He is not a student.
2. 借助助动词do/does/did,在其后加not。
如:I like English. 变为
I do not like English.
3. 实义动词前加助动词do/does/did 的否定形式,后接动词原形。
如:She goes to school by bike. 变为She doesn't go to school by bike.
4. 祈使句变否定句,一般在句首加Don't。
如:Open the door. 变为Don't open the door.
5. there be 句型的否定句,在be 动词后加not。
如:There is a book on the desk. 变为There is not a book on the desk.
需要注意的是,根据句子的不同情况选择不同的方法,同时还要注意句子的时态和人称等变化。
肯定变否定
肯定句变否定句规则
(1)含有系动词be,变否定时,be后加not
(2)含有助动词have、has,变否定时,have、has后直接加not。
(3)含有情态动词can、may、must、will、shall,变否定时,直接加not
(4)句子谓语动词是实义动词时,若为动词原形,在其前加do not;若为动词的单三形式,把单三变为动词原
形,再在其前加does not;若动词为过去式,把过去
式变为原形,再在其前加did not。
(5)句子中含有all,both的句子变完全否定时,要将all →none,both→neither,both…and…→neither…nor…
要注意谓语动词的变化。
(6)现在完成时、过去完成时变否定时为have/has+not+done 和had+not+done。
(7)“had better do something”变否定时为“had better not do…”。
肯定句变否定句的基本方法
肯定句变否定句的基本方法一、动词be 的否定式动词be根据不同的人称和时态可以有am, is, are, was, were等不同形式,可用作连系动词(表示“是”、“在”等)和助动词(用于构成进行时态和被动语态等),但不管何种情况,构成否定式时,一律在其后加notI’m old, but you’re young. 我老了,但你还年轻。
→I’m not old, but you’re not young. 我还不老,但你不年轻了。
He was reading and I was writing. 他在读,我在写。
→He was not reading and I was not writing. 他没有在读,我没有在写。
二、动词have 的否定式动词have根据不同的人称和时态可以有have, has, had等形式,可以用作实意动词和助动词,分以下情况讨论1. 用作实意动词表示状态,如表示拥有、患病或用于have to表示“必须”等,在构成否定式时可以直接在其后加not,也可根据情况在其前使用don’t, doesn’t, didn’tHe has a car. 他有辆小汽车。
→He hasn’t a car. / He doesn’t have a car. 他没有小汽车。
He had some dictionaries. 他有一些词典。
→He hadn’t any dictionaries. / He didn’t have any dictionaries. 他没有词典。
You have to go with him. 你必须同他一起去。
→You haven’t to go with him. / You don’t have to go w ith him. 你不必同他一起去。
【注】have to构成否定式时以在其前加don’t等较为常见。
2. 用作实意动词表示动作,如表示“吃(=eat)”、“喝(=drink)”、“拿(=take)”、“收到(=receive)”、“度过(=spend)”等,构成否定式时不能直接在其后加not,而应根据情况在其前使用don’t, doesn’t, didn’tHe had some cake for breakfast. 他早餐吃了些蛋糕。
肯定句改否定句的方法
肯定句改否定句的方法
肯定句改为否定句有以下几种方法:
1. 在主语前加上否定词“不”。
例如:他去了超市。
→他不去了超市。
2. 在动词前加上否定词“不”。
例如:我喜欢吃巧克力。
→我不喜欢吃巧克力。
3. 在句子中其他位置加上否定词“不”。
例如:这个菜很好吃。
→这个菜不很好吃。
需要注意的是,有些动词需要使用“不”和“没”来表示否定,例如“吃”和“喝”等动词就需要用“不”表示否定,“没”表示否定的次数或状态。
例如:我今天没吃早饭。
(表示我今天没有吃早饭);我不喜欢喝咖啡。
(表示我不喜欢喝咖啡)
还有一种方法是使用含有否定意义的词语组成否定句。
例如:没有、不是、不会等。
例如:我没有去过北京。
(表示我从未去过北京);他不是我的同学。
(表示他不是我的同学);我不会说英语。
(表示我不会说英语)
以上是肯定句改为否定句的常用方法。
需要注意的是,句子的语境和语气也可能影响否定句的表达方式。
英语肯定句变否定句所有规则
一、简单句中含有be动词、情态动词和助动词时,变否定句时需在be动词、情态动词和助动词后加not。
1. (am, is ,are 是be动词)如:I am a teacher.→I am nota teacher.This is a pen.→ This is not a pen.或This isn’t a pen. (is not =isn’t) You are a boy. →You are not a boy. (are not =aren’t)2. (can是情态动词)He can help me.→He can not help me.或He can’t help me.(can not =can’t )3.当主语是第一人称、第二人称和第三人称复数时用助动词do,变否定时,在do后面加not 如:I like English .I do not like English.或I don’t like English.They go to school together. →They do not (don’t) go to school together.4.当主语是第三人称单数时用does,变否定时,在does后面加not,如:The little girl wants to go there.→ The little girl does not (doesn't ) want to go there.2.简单句中谓语动词为行为动词时,要根据时态选用do的相应形式,把肯定句变为否定句。
如:The little girl wants to go there.→The littl e girl doesn't want to go there.He did his work yesterday.→He didn't do his workyesterday.3.祈使句变否定句时,一般在句首加Don't,但Let us或Let's 开头的祈使句在Let us或Let's后加not也可。
肯定句变否定句
肯定句变否定句一、动词后直接加not。
原句中含有be动词 (am, is, are, was, were) 。
I am a teacher. ---->I am not a teacher.我是一个老师。
---->我不是老师。
原句中含有情态动词 (can, shall, will, may, should, would, might, had better 等) 。
Li Lei can swim.---->Li Lei cannot/can't swim.李雷会游泳。
---->李雷不会游泳。
He will go to the zoo if it rains tomorrow.---->He will not/won't go to the zoo if it rains tomorrow.如果明天下雨,他将去动物园。
---->如果明天下雨,他就不去动物园了。
原句中含有助动词(have, has, had)。
We have learned 3,000 words. ---->We have not/haven't learned 3,000 words.我们已经学会了3000个单词。
---->我们还没有学会3000个单词。
We have heard from him since he left. ---->We have not heard from him since he left.他走后我们收到他的来信。
---->他走后杳无音讯。
二、原句中没有be动词,助动词或情态动词时,要在行为动词前加助动词 (do, does, did) 与否定副词 not 的缩写形式。
句中第一个动词是原形时,在其前加上don’t。
I get up at six o'clock every day.---->I don't get up at six o'clock every day.我每天六点起床。
小学英语肯定句变否定句方法及练习
句型转换的方法(一)一、肯定句改否定句的方法——一步法1、在be动词后加not。
如:is not ,are not ,am not,was not,were not;例如:He is in the classroom. (改为否定句)He is not ( isn’t ) in the classroom.2、在can,should,will等后加not。
如:can not,should not,will not;例如:Mike can sing English songs. ( 改为否定句)Mike can not ( can’t ) sing English songs.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。
例如:I like pizza. ( 改为否定句)I don’t like pizza.4、句中有some 的要改成any。
例如:There are some books on the desk. ( 改为否定句)There are not ( aren’t ) any books on the desk.二.实战演习: 把下列各句改为否定句1.John is walking in the park.__________________________________2.Tom and Marry are friends.___________________________________3.I’m a student.___________________________________4.She will go to Beijing tomorrow,___________________________________5.We get there by bike.___________________________________6.He likes apples.___________________________________7.There are some flowers in the picture.__________________________________8.I often play football with my friend.__________________________________9.We are from China.__________________________________10.They can go to school by ferry._________________________________1。
英语句型转换-肯定句变否定句
1.有be动词或者情态动词的肯定句变否定句转变方法:在be动词或情态动词后面直接加not例1. I am a student. → I am not a student.例2. You are sad. → You are not sad.例3. I can swim. → I can not swim.例4. You will go to the park.→ You will not go to the park.2.没有be动词也没有情态动词,有实意动词(表示动作的动词)的肯定句变否定句转变方法:借助助动词(do, does, did)来帮助否定①当句中的动词是原形时,加don't。
例1. I like English.→ I do not like English.例2. You have dinner.→ You do not have dinner.②当句中的动词是第三人称单数时,加doesn't ,再加动词原形。
例1. She likes singing.→She doesn't like singing.例2. She does her homework.→ She does not do her homework.③当句中的动词是过去式时,用didn't,加动词原形例: We had a great time during our holidays.→We did not have a great time during our holidays.3. 动词have/has的特殊说明:①当have表示“某人有什么的时候”,其否定形式为have not/has not例: She has two books.→ She has not two books.②当have作为实意动词时,其否定形式为do not have/does not have例: You have dinner.→You do not have dinner.③当have在完成时中作为助动词时,其否定形式为have not/has not例: I have seen this film.→ I have not seen this film.4. 一些特殊说明:①肯定陈述句中的some/too,在否定陈述句中应改为any/either。
英语 肯定句变为否定规则
一、简单句中含有be动词、情态动词和助动词时,变否定句时需在be动词、情态动词和助动词后加not。
1. (am, is ,are 是be动词)如:I am a teacher.→I am nota teacher.This is a pen.→ This is not a pen.或This isn’t a pen. (is not =isn’t) You are a boy. →You are not a boy. (are not =aren’t)2. (can是情态动词)He can help me.→He can not help me.或He can’t help me.(can not =can’t )3.当主语是第一人称、第二人称和第三人称复数时用助动词do,变否定时,在do后面加not 如:I like English .I do not like English.或I don’t like English.They go to school together. →They do not (don’t) go to school together.4.当主语是第三人称单数时用does,变否定时,在does后面加not,如:The little girl wants to go there.→ The little girl does not (doesn't ) want to go there.2.简单句中谓语动词为行为动词时,要根据时态选用do的相应形式,把肯定句变为否定句。
如:The little girl wants to go there.→The little girl doesn't want to go there.He did his work yesterday.→He didn't do his work yesterday.3.祈使句变否定句时,一般在句首加Don't,但Let us或Let's 开头的祈使句在Let us或Let's后加not也可。
肯定句变为否定句的一些情况
肯定句变为否定句时应注意的特殊情况肯定句变为否定句时,通常必须在句中加上副词not 。
可是对有些特殊的情况我们还必须加以注意,现根据初中英语教材对这些特殊情况说明如下:1. 如果肯定句中有连词and ,变为否定句时,通常要将and 变为or 。
例如:The girl can sing and dance. → The girl cannot sing or dance.The boy has father and mother. → The boy has no father or mother.(或The boy has not any father or mother. )2. 如果肯定句中some ,变为否定句时,some 一般要改为any 。
例如:There are some boys in the room. → There are not any boys in the room.3. 如果肯定句中有too (也),变为否定句时,应将too 改为either 。
例如:Wang Ling is a teacher, too. → Wang Ling is not a teacher, either.4. 如果肯定句中有already ,变为否定句时,应将already 改为yet ,并放在句末。
例如:The worker has finished his work already. → The worker has not finished his work yet.5. 如果肯定句中有“ had better ”,变为否定句时,not 要放在“ ha d better ”之后。
例如:You had better write to your teacher. → You had better not write to your teacher.6. 如果肯定句中有always ,变为否定句时,要将always 改为never 。
肯定句变成否定句以及把陈述句变成一般疑问句
【专项练习】把肯定句变成否定句和一般疑问句【发卷日期】2013年______月_______日【学生姓名】__________________________一、把肯定句变成否定句:分类肯定句如何变否定句例句【第一种情况】●句中有be动词(am,is,are,was,were);●直接在be动词的后加not。
●am not(无缩写形式)●is not(缩写:isn’t)●are not(缩写:aren’t)【肯定句】He is a driver.【否定句】He is not a driver.【第二种情况】●句中有情态动词;●直接在情态动词后加not。
中学阶段常用的情态动词:●can【可以】→ can not或cannot(缩写:can’t)●could【可以,can的过去式】→could not(缩写:couldn’t)●shall【将要,应该】→ shall not(缩写:shan’t)●should【将要,应该】→ should not(缩写:shouldn’t)●may【也许】→ may not(缩写:mayn't)●might【也许】→ might not(缩写:mightn’t)●will【将要】→ will not(缩写:won’t)●would【将,愿意】→ would not(缩写:wouldn’t)●must【很可能,必须】→ must not(缩写:musn’t)【肯定句】She will come tomorrow.【否定句】She will not come tomorrow.【第三种情况】(1)●句中没有be动词或情态动词;●句子是一般现在时;●直接在动词前加助动词do not。
do not(缩写:don’t)+动词原形【注意】助动词是语法功能词,自身没有词义,不可单独使用,因此没有对应的中文翻译。
【肯定句】They like apples.【否定句】They don’t like apples.【第三种情况】(2)●句中没有be动词或情态动词;●句子是一般现在时;●主语是第三人称单数;●在动词前加助动词does not;●动词变回原形。
肯定句变否定句的方法
肯定句变否定句的方法一、中文的肯定变为否定:①.改变原意,加一个(或奇数个否定的词),对句子否定:例如:小明喜欢打篮球→小明不喜欢打篮球;②.不改变意思,找出与句子中含义相反的一个词,对这个含义相反的词进行否定:例如:这项任务是很难完成的→这项任务是不易完成的;③.不改变意思,加两个否定词(或偶数个否定词),构成双重否定句:例如:他这周需要去出差→他这周不得不出差。
二、英语的肯定句变为否定句:Ⅰ、如果句子中存在be动词(am/is/are/was/were),变为否定句只需要在be动词后+not:eg:He was playing the piano at that time→He wasn't playing the piano atthat time.他那时(不)在弹钢琴。
Ⅱ、如果句子中存在情态动词will/would,may/might,shall/should,can/could,need,ought以及had better,在这些后+not:eg:You had better get up early→You had better not get up early.你最好(不要)早点起床。
注意:ought to应该…在肯定句中“to”不得省略,在疑问句— 1 —或否定句中省略。
Ⅲ、如果句子中仅有实义动词,则需要添加助动词,在助动词后+not:非单三的一般现在时:在动词前+don't 单三的一般现在时:在动词前+doesn't一般过去时:在动词前+didn't 完成时:在have/has/had后+not 被动:在第一个助动词后+notSth be not+done/Sth have(has)not been doneⅣ、固定搭配:tell sb(not)to do sth,let sb(not)do sth,…— 2 —。
肯定句改否定句的方法
肯定句改否定句的方法首先,我们来看一下肯定句改否定句的一般规则。
在英语中,我们可以通过在句子中加入否定词来改变肯定句为否定句。
比如,在一般现在时和一般过去时中,我们可以使用否定词"not"来改变肯定句为否定句。
例如,肯定句"I am happy"可以改为否定句"I amnot happy",肯定句"They were here"可以改为否定句"They were not here"。
其次,我们可以通过使用否定词来改变肯定句为否定句。
在英语中,有一些词语本身就具有否定的意义,比如"never"、"nobody"、"nothing"等。
我们可以通过在句子中加入这些词语来改变肯定句为否定句。
例如,肯定句"I have never been there"可以改为否定句"I have been there",肯定句"Everybody likes him"可以改为否定句"Nobody likes him"。
此外,我们还可以通过改变句子结构来将肯定句改为否定句。
在英语中,有一些句型本身就具有否定的意义,我们可以通过改变句子结构来将肯定句改为否定句。
比如,在倒装句中,我们可以通过将助动词或情态动词与主语倒装来将肯定句改为否定句。
例如,肯定句"He can speak Chinese"可以改为否定句"Can he speakChinese",肯定句"They have finished their work"可以改为否定句"Have they finished their work"。
最后,我们还可以通过使用一些特殊的句型或词语来将肯定句改为否定句。
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肯定句变否定句
一、be 动词
be (am is are was were)后加not,可缩写成isn’t ; aren’t; wasn’t; weren’t. some 变any.
1、It is sunny today .
It _____ sunny today.
2、They were in Chengdu yesterday.
They _____ _____ in Chengdu yesterday.
3、There are some birds in the tree.
There ______ _____ bird in the tree.
二、情态动词
Can \could\ should \had better\will后加not . some 变any
缩写成:can’t \couldn’t \ shouldn’t \had better not\won’t
1、They can dance to Dico.
They _____ dance to Disco.
2、you had better take a bag with you .
You ______ ______ _______ take a bag with you .
3、you should drink some water .
You ______ drink ______ water.
三、行为动词
在行为动词前加don’t/doesn’t/didn’t,行为动词改为原形。
some 变any
1、I play basketball every day
I ______ ______ basketball every day.
2 I do my homework at home.
I _____ _____ my homework at home.
3 she does her homework at home after supper.
She ______ ______ her homework at home after supper.
4Mary listens to music every Sunday.
Mary ______ _____ to music every Sunday.
5we played basketball yesterday.
We ______ ______ basketball yesterday.
6Tom hurt himself last night.
Tom ______ _____himself last night.
7 My mother bought a MP4 for me last month.
My mother ________ ________ a MP4 for me last month.
四、特殊句型
1 There is something wrong with my computer.
There ______ ______ wrong with my computer.
There ______ ______ wrong with my computer.
五、祈使句
1 Be careful.
_____ ______ careful.
2Turn right.
______ ______ right.。