肯定句变否定句

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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。

肯定句变否定句+附答案

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

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

英语四个基本时态的  肯定句变否定句
____H_i_s_b_ir_t_h_d_ay__is_n_o_t_o_n__th_e__tw_e_n_t_ie_t_h_o_f_N__o_ve_m_b_e_r_.______ . 10. Mrs. Li and Kitty are in a big shop.
_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
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…”。

肯定句改否定句的方法

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。

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2. You can use the dictionary. You can't use the dictionary.
3. Peter need go home now. Peter needn't go home now .
4. You should say “Sorry”. You shouldn't say “Sorry”.
肯定句变否定句 练一练
1. I am your friend. _____________________________
2. My mother is a worker. _____________________________
3. There are some books on the bookshelf. _____________________
③当句中的动词是过去式时,在动 词前加didn’t,动词还原原形。 We had a great time last year.→ We didn't have a great time last year.
I went to school yesterday. → I didn't go to school yesterday.
4. You should open your book. You should not open your book. 5. He must finish his homework. He must not finish his homework.
2.如果句中有 (can ,may,must,should , need, will等),就在这些单
4. I was at home yesterday. _____________________________
5. They were in Beijing ten years ago. _________________________
6.Lucy will be back in a week. ______________________
12. Peter did lots of work last night. __________________________
肯定变否定,其实并不难,抓住动词是关键。 Be动词,首先看,有它在,not放在它后面。 Can,may,must,should,need,will,不一般, Not加在它后面。 以上这些都不见,你就应该小心点, Don’t站在动原前, Doesn’t站在单三前, Didn’t站在过去式前, 小心注意有一点, 要把动词变一变, 变回原型才全面. 这样说一说,你看难不难? 唉!不难!不难!真不难!
注意:句中有 some,一般要改为
பைடு நூலகம்any.
1.I can swim. → I can not swim. 2.You will go to the park. → You will not go to the park. 3. Peter need go home now. Peter need not go home now
肯定句变否定句
1.I am a student. → I am not a student. 2.You are sad. → You are not sad. 3. She is a good girl. → She is not a good girl. 4.Yesterday was Monday. → Yesterday was not Monday. 5.They were busy yesterday. → They were not busy yesterday.
词后面直接加not。
can not = can't must not = mustn't should not = shouldn't need not = needn't will not = won't
1. Lucy will be back in a week. Lucy won't be back in a week.
肯定祈使句变否定祈使句,也是 在动词前加直接don't. 3. Have some bread, Tom. Don't have any bread ,Tom. 4. Please open your books.
Please don't open your books.
②当句中的动词是第三人称单数时, 在动词前加doesn’t ,动词还原原形。 She likes singing. → She doesn’t like singing. She does her homework. → She doesn’t do her homework.
1. He is a boy. He is not a boy. 2. I am your friend. I am not your friend. 3. My sister is a beatiful girl. My sister is not a beatiful girl.
5.There are some books on the bookshelf. There are not any books on the bookshelf. 6. I was at home yesterday. I was not at home yesterday. 7. They were in Beijing ten years ago. They were not in Beijing ten years ago.
1.如果句中有be动词
( is, am , are, was,
were),就在be动词后 面直接加not。
be 动词和not的缩写形式: is not = isn't are not = aren't was not = wasn't were not = weren't 注意:am not 不能缩写。
7.She can sing a song and draw a picture. _____________________________ 8. Peter need go home tomorrow. _____________________________ 10. We come from China. _ _____________________________ 11.He likes the violin. _____________________________
5. He must stay at home . He mustn't stay at home .
3.如果句中没有be动词,也 没有情态动词,就
要借助(don’t, doesn’t, didn’t)来帮忙。
①当句中的动词是原形 时,在动词前直接加 don’t。 I like English. → I don't like English. You have dinner. → You don't have dinner.
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