英语肯定句变否定句所有规则21
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。
英语肯定句改否定句的方法

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)。
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。
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。
英语肯定句变否定句所有规则21

一、简单句中含有b e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.→Iamnota 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.→Hecan 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n ot 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 schooltogether.4.当主语是第三人称单数时用d oes,变否定时,在does后面加not,如:The littlegirl wants to go there.→ The littlegirl 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 littlegirl wants to go there. →Thelittlegirl doesn't want to go there.He did his work yesterd ay.→ He didn't do his workyesterd ay.3.祈使句变否定句时,一般在句首加D on't,但Let us或Let's 开头的祈使句在Let us或Let's后加not也可。
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。
(完整版)英语语法之肯定句变否定句

英语语法之肯定句变否定句一、肯定句变否定句口诀给句子分析它,看它结构是哪个主加be后加not 其他一切全照抄主加动词主重要don't doesn’t 来帮忙don’t doesn't 中间夹doesn’t doesn't 最特殊第三人称单数全靠它二、简单句的句子结构1.主语+be+其他2.主语+动词+其他备注:其中be里包括(am is are)判断下列各句是主语加be还是主语加动词1.I am a girl.2.I like singing。
3.We go to school every day.4.They are good friends.5.He works hard.6.She likes playing with toys.7.My mother watches TV every day.8.You are a beautiful girl.9.Tom is playing football on the playground。
10.Bill does his homework after supper。
三、肯定句变否定句规则肯定句主语+be+其他变成主语+be+not+其他主语+动词+其他变成主语+don't+动词+其他主语(第三人称单数)+动词单三+其他变成主语(第三人称单数)+doesn’t +动词原形+其他练习1.She is watching TV now。
2.We go to school on Sunday.3.His father works hard.4.Jack's mother is a nurse.5.The cat runs fast。
6.They like reading books.7.My grandpa gives me a hot dog。
8.Tom often walks to school。
9.I have a doll.10.It is eating fish.。
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 |.。
- 1、下载文档前请自行甄别文档内容的完整性,平台不提供额外的编辑、内容补充、找答案等附加服务。
- 2、"仅部分预览"的文档,不可在线预览部分如存在完整性等问题,可反馈申请退款(可完整预览的文档不适用该条件!)。
- 3、如文档侵犯您的权益,请联系客服反馈,我们会尽快为您处理(人工客服工作时间:9:00-18:30)。
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 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。
如:Put them over there.→Don't put them over there.Let us go home.→Let us not go home.或Don’t let us go home.4.主从复合句中,主句是I think,I believe等结构,变否定句时,形式上否定主句,实际上否定从句。
如:I don't think chickens can swim .我认为鸡不会游泳。
5.“had better+动词原形”,变否定句时为“had better not +动词原形”。
如:You'd better go to school.→ You'd better not go to school.6.动词不定式变否定式时,常在不定式to前加not。
如:The teacher tells me to do it.→ The teacher tells me not to do it.7.使役动词和感官动词(make,let,hear,see,watch等)后接省略to的不定式,此种不定式变否定句时只需在省略to 的动词原形前加not。
如:I saw her work.→I saw her not work.8.特殊形式的否定句,有以下几种:(1)肯定句含有every-的合成词时,变否定句时改为no-。
如:Everything is ready.→Nothing is ready.(2)肯定句中含有always,usually和ever时,变否定句时改为never。
如:He is always late for school.→He is never late for school.(3)肯定句含有many,much时,变否定句时分别改为few,little。
如:Many students know him.→Few students know him.(4)肯定句中含有still时,变否定句时应改为no longer。
如:Tom is still in bed.→Tom is no longer in bed.(5)肯定句含有both,both...and,all时,变否定句时应改为never,neither...nor,none。
如:Both of us are students.→Neither of us is a student.(6)肯定句含有nearly,almost时,变否定句时应改为hardly。
如:Lily nearly knows him .→Lily hardly knows him .(7)肯定句含有“形容词+enough”时,变为否定句时应改为“too +形容词的反义词”。
如:He is short enough to reachit.He is too tall to reach it.(1)谓语动词是be,have(有)或谓语含有助动词、情态动词时,直接在这些词后加上否定词not。
如:She can swim.She can't swim.(2)谓语动词是行为动词时,要在该动词前加上do /does/did not,该词恢复原形。
如:He gets up early.He doesn't get up early.(3)既要否定谓语动词,又要变换句中的单词。
如:He can read and write.He can't read or write.(4)用含否定意义的词或词组取代肯定句中的某些词或词组。
如:I know both English and Chi- nese.I know neither English nor Chinese.类似的有:ever /always never,somebody nobody,something nothing,everybody no one,almost hardly 2.祈使句的肯定式变否定式(1)一般在动词前加上don't。
如:Open the window .Don't open the window.(2)含有“L et's...”的祈使句,一般用“Let'snot...”的形式,美国人偶尔也用“Don'tlet's...”这一形式。
加强语气时使用“Let'sdon't...”这一形式。
如:Let's go there.Let's not go there.3.复合句的肯定式变否定式一般将主句变为否定式。
如:I saw her when I left .I didn't see her when I left.肯定句改为否定句的基本方法把肯定的陈述句改为否定句的基本方法首先要掌握否定句构成的基本规则。
①当陈述句的谓语动词由be构成时,改为否定句,把not 加在be后面。
例1.They are doctors.这个句子的谓语动词是由系动词构成的,改为否定句时把not加在are的后面,即:They are not doctors.例2.He is g oing to see his friend tomorrow.本句的谓语由is going to see构成,改为否定句时把否定词not 加在is后面,即:He is not going to see his friend tomorrow.②当陈述句的谓语由情态动词can(may,must等)+其他动词构成,或由助动词will,have,had等十其他动词构成时,改为否定句,用情态动词或助动词十not+动词的形式表示。
例3.They will go to see their parents this afternoon.这个句子谓语由助动词will加动词g o构成,改为否定句时,把not放在will后面,即:They will not(won't)go to see their parents this afternoon.例4.The train had already left when we got to the station.这个句子谓语由助动词had加leave的过去分词left构成,改为否定句时要把not加在had后面,同时already改为yet,即:The train had not left yet when we got to the station.例5.Linda can speak Chinese well.本句的谓语由can+speak构成,把它改为否定句时,在can 后面加not,即:Linda can not speak Chinese well.例6.We have already learned English for two years.本句的谓语由have+learned构成,把它改为否定句时,要在助动词have后面加not,把句中的already改为yet,即:We have not learned English for two years yet.③当陈述句的谓语动词是have,表示有什么,改为否定句的方法是:(A)由have+not+其他;(B)由have十no十其他;(C)由don't(doesn't,didn't)+have十其他,如果句中有some,要将some改为any。
例7.You have some books.这个句子谓语动词have当“有”讲,在改为否定句时要把not放在have后,并把some改为any,即:You have not any books.这个句子也可以改写为在have后加no即:You have no books.这个句子还可以改写为:You don't have any books.④当陈述句的谓语由have十其他词构成,这时have不当“有”讲,也不是“助动词”,改为否定句时,由助动词do(does,did)+not+have构成否定结构。
例8.They often have breakfast at seven in the morning.本句的谓语动词是have,而have+breakfast的意思是“吃早饭”,把它改为否定句,要由助动词do+not+have breakfast 构成否定形式,即:They don't have breakfast at seven in themorning.例9.He had a meeting yesterday afternoon.本句谓语动词had+meeting的意思是“开会”,是一般过去时,改为否定句时由did not+have a meeting构成否定形式,即:He didn't have a meeting yesterday afternoon.●以上两个例句说明改成否定句时,千万不要盲目把否定词加在have(has,had)后面。