为什么She must be a teacher 的反义疑问句用isn't she ,They must do their work的反义疑问句用 don't t

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i think he must be a teacher,isn't he ? 这句反义疑问句为什么这样变?~

这个问题嘛...应该这样回答:

我直接告诉你吧,must be是表现在推测的,表现在推测知道什么意思吧,must be 一定 may be 可能 can't be不可能 。以上三个就是表现在推测的标志。凡是表现在推测的,肯定就都用isn't 否定就用is
给你点列句吧,要不然你不懂
He must be a teacher , isn't he ? 他一定是个老师,不是吗?
He may be a teacher ,isn'e he ?他可能是个老师,不是吗?
He can't be a teacher , is he ?他不是能是个老师,是吗?
认真比对下这三句话就行了

至于第二个问,我相信你已经懂了。
第三个问嘛,应该是带宾语从句的反义疑问句了,这时呢,疑问部分要与主句一致,还是给你点列举吧,要不然不好理解:
He said he would come , didn't he ?他说他准备过来了,是不是?
你那句话就应该是
He thinks she isn't a student , does he ? 完全正确!
为了区分,我在多说一句吧
当陈述部分为第一人称时,就是句子开头是i/we时,记得疑问部分与从句一致,给你点列句。
I don't think he can finish the work ,can he ?我不相信他能完成这工作,有木有?
仔细比对下就行了

当陈述部分有情态动词must,问句有4种情况。
1、mustn't表示“禁止,不可,不必”时,附加问句通常要用must。例如:You mustn't stop your car here,must you? 你不能把车停在这地方,知道吗?
2、must表示“有必要”时,附加问句通常要用needn't。例如:They must finish the work today,needn't they? 他们今天要完成这项工作,是吗?
3、当must用来表示对现在的情况进行推测时,问句通常要根据must后面的动词采用相应的形式。例如:He must be good at English,isn't he? 他英语一定学得很好,是吗?
4、当must+have done表示对过去的情况进行推测(一般句中有明确的过去时间状语),问句要根据陈述部分谓语的情况用“didn't+主语”或“wasn't/weren't+主语”。如果强调动作的完成(一般没有明确的过去时间状语),问句要用“haven't/hasn't+主语”。例如:
She must have read the novel last week,didn't she? 她上星期一定读了这本小说,是吗?

扩展资料:
1、must表示“必须”、“一定要”可用于肯定句、否定句或疑问句;用于否定句时,mustn't 的意思是“一定不要”、“不能”,而不是“不必”。例如:You must finish it today. 你一定要在今天完成它。
2、句子中主要表示现在或将来,但有时(如在间接引语中)也可表过去=had to。例如:She asked if she must (had to) leave. 她问她是否一定要离开。
3、must可接被动结构或进行形式。例如:Something must be done to stop it. 必须采取措施来阻止它。

1.前一句有be动词,又是肯定句,依据前肯后否得到isn't she
2.第二句must后有do,又是肯定句,依据前肯后否得到don't they
拓展一下:反义疑问句
1.陈述部分肯定式+疑问部分否定式可记为前肯后否定.They work hard, don’t they?
2.陈述部分否定式+疑问部分肯定式可记为前否后肯定.You didn't go, did you?句子类型:一种是反义的附加疑问句,一种是非反义的附加疑问句。简单来说,就是“前肯后否”或“前否后肯”。
【速记方法】
前肯后否,前否后肯,前be后be,前无be后加助,时态一致。
【总结】
(1)当陈述部分有never,seldom, hardly,few,little,barely, scarcely, nothing,none,rarely ,no, not, no one, nobody, neither等否定意义的词汇时,后面的反意疑问句则为肯定形式:
There are few apples in the basket, are there?
He can hardly swim, can he?
They seldom come late, do they?
(2)当陈述部分的主语为everyone,someone,anyone,no one等表示人的不定代词时,疑问部分的主语用they或he:
Everyone in your family is a teacher, aren’t they\isn't he?
(3)当陈述部分的主语为everything,something,anything.nothing等表示物的不定代词时,疑问部分的主语用it:
Something is wrong with your watch, isn’t it?
(4)当陈述部分含有否定意思的词是unhappy,dislike,unfriendly,等含有否定词缀的派生词,也就是有un,dis,no-前缀、less-后缀等含有词缀而意思否定的词,当做肯定句处理,疑问部分要用否定形式。如:
He looks unhappy,doesn’t he? 他看上去不高兴,不是吗?
The girl dislikes history,doesn’t she? 这女孩不喜欢历史,不是吗?有less, fewer等词视为肯定词,疑问部分用否定形式。
如:There will be less pollution, won't there?
表示主语主观意愿的词

含有think, believe, suppose, imagine, expect等动词后接宾语从句构成的主从复合句在构成反意疑问句时,视情况不同有两种不同的构成方式。 (即当主句是I think,I believe,I suppose,I imagine,I expect时要反问从句,其余句式均反问主句。)
(1)当主句的主语为第一人称时,其后的简短问句应与从句相一致。例如:
I expect our English teacher will be back this weekend, won't she/he?
We suppose you have finished the project, haven't you?
值得注意的是,当这些动词后接的宾语从句的否定转移到主句时,其仍属否定句,故其后的简短问句应用肯定式,而非否定式。例如:
I don't believe that he can translate this book, can he?
We don't imagine the twins have arrived, have they?
此类句子的回答同"前否后肯"型反意疑问句一样,如上述后一个句子,若双胞胎已经到了,则回答为"Yes, they have.";若尚未到达,使用"No, they haven't."。
(2)当主句的主语为第二、三人称时,其后的简短问句则应与主句相一致(此时,否定只看主句,与从句无关)。例如:
Your sister supposes she needs no help, doesn't she?
You thought they could have completed the project, didn't you?
They don't believe she's an engineer, do they?
She doesn't expect that we are coming so soon, does she?
(3)但如果主句的时态是过去时等等,疑问句应和主句的人称时态保持一致。
had better或have

陈述部分有had better,或其中的had表示完成时态时,疑问句应用hadn’t等开头:
You’d better get up early, hadn’t you?
其他情况句中有have时疑问句应用don't等开头
如have表示“有”的时候,有两种形式:(have 表示有可用do或have来改写)
-He has two sisters,doesn’t he? =He has two sisters, hasn’t he?
-He doesn't have any sisters,does he?
祈使句

当陈述部分是祈使句时,疑问句要根据语气来表达,分三种情况:
1)一般情况下用will you 或won't you。
Give me a hand, will you?
Leave all the things as they are, won’t you?
2)以Let's(听者包括在内)开头的祈使句,前肯后可肯可否,疑问句必须用shall we(shall只用于第一人称);只有以Let us(听话人不被包括在“us”里面)或Let me开头的祈使句,问句才用will you。
Let us know the time of your arrival, will you?
Let's try again, shall we?
Let me help you, will you?
Let’s have a look on your book,shall we?
3)当陈述句是否定的祈使句时,问句可用will you 或can you 。
e.g. don’t make much noise, will/can you?
There be句型

There be 句型中,反义疑问部分必须为be 动词 + there
There are some apples in the basket, aren't there?
There isn't any milk left, is there?
Must

.当陈述部分有情态动词must,问句有4种情况:
(1)mustn't表示“禁止,不可,不必”时,附加问句通常要用must.
You mustn't stop your car here, must you?
你不能把车停在这地方,知道吗?
(2)must表示“有必要”时,附加问句通常要用needn't.
They must finish the work today, needn’t they?
他们今天要完成这项工作,是吗?
(3)当must用来表示对现 在的情况进行推测时,问句通常要根据must后面的动词采用相应的形式。
He must be good at English, isn’the? 他英语一定学得很好,是吗?
She must be a good English teacher, isn’t she? 她一定是位优秀的英语老师,是吗?
(4)当must have done表示对过去的情况进行推测(一般句中有明确的过去时间状语),问句要根据陈述部分谓语的情况用“didn't+主语”或“wasn't/weren't+主语”;如果强调动作的完成(一般没有明确的过去时间状语),问句要用“haven't/hasn't+主语”。
She must have read the novel last week, didn’t she?
她上星期一定读了这本小说,不是吗?
You must have told her about it, haven’t you?
你一定把这事告诉她了,不是吗?
回答 反意疑问句的回答:前肯后否,前否后肯,根据事实从后往前翻译。如:
(1)They work hard,don’t they?他们努力工作,不是吗?
Yes, they do.对,他们工作努力。/No, they don't.不,他们工作不努力
(2)They don’t work hard, do they? 他们不太努力工作,是吗?
Yes, they do. 不,他们工作努力。/No, they don't. 是的, 他们工作不努力
否定反义疑问句的回答

当陈述部分为肯定式,反义疑问句为否定式时,其回答一般不会造成困难,一般只需照情况回答即可:
"It’s new, isn’t it?" "Yes, it is." “是新的,不是吗?”“是,是新的。”
"He wants to go, doesn’t he?" "No, he doesn’t." “他想去,不是吗?”“不,他不想去。”
此时,"Yes"即是,对前面"It's new."的肯定。
回答反义疑问句的原则

回答反意疑问句通常应根据实际情况来确定,如有人问你You are asleep, aren’t you? 你应回答No, I’m not. 因为既然你能回答,肯定你还没有asleep。但如果别人问你 You aren’t asleep, are you?(你还没有睡着,对吗),你也只能回答No, I’m not.(是的,还没有睡着),而不能回答为Yes, I’m not. 也不能回答成 Yes, I am.
“It is a beautiful flower,isn't it?” “It isn't a beautiful flower,is it?”
上述两句句子的回答肯定均为“Yes,it is."否定为“No,it isn't."
由上述例子可知,反义疑问句回答与句子本身所包含的中文肯定与否的含义并无太大关联,只需注意事实,肯定即用yes,否定用no,无需考虑句子原本是前否后肯或是前肯后否。
建议在答题时,先按照实际写后面的答句,再根据前后一致原则写Yes或No。
口诀
反意疑问并不难,陈述疑问句中含。
前后肯否恰相反,否定词缀不能算。
主谓时态要一致,特殊情况记心田。
实际情况来回答,再把yes和no拣。
综上所述,反义疑问句回答就是按实际情况回答。
对反意疑问句的回答,无论问题的提法如何,如果事实是肯定的,就用yes,事实是否定的,就要用no。要特别注意陈述句部分是否定结构,反意疑问句部分用肯定式提问时,回答yes或no与汉语正好相反。这种省略回答的yes要译成“不”,no要译成“是”。
例:—He likes playing football, doesn’t he? 他喜欢踢足球,不是吗?
—Yes, he does. / No, he doesn’t. 是的。/ 不是。
—His sister didn’t attend the meeting, did she? 他妹妹没有参加会议,是吗?
—Yes, she did. / No, she didn’t. 不,她参加了。/ 是的,她没参加。
简要总结反意疑问句19条:
1) 陈述部分的主语是I,疑问部分要用 aren't I.
I'm as tall as your sister,aren't I?
2) 陈述部分的谓语是wish,疑问部分要用may +主语。
I wish to have a word with you, may I?
3) 陈述部分用 no, nothing, nobody, never, few, seldom, hardly, rarely, little等否定含义的词时,疑问部分用肯定含义。
The Swede made no answer, did he / she?
Some plants never blown (开花), do they ?
4) 含有ought to 的反意疑问句,陈述部分是肯定的,疑问部分用shouldn't / oughtn't +主语。
He ought to know what to do, oughtn't he? / shouldn't he?
5) 陈述部分有have to +v. (had to + v.),疑问部分常用don't +主语(didn't +主语)。
We have to get there at eight tomorrow, don't we?
6) 陈述部分的谓语是used to 时,疑问部分用didn't +主语或 usedn't +主语。
He used to take pictures there, didn't he? / usedn't he?
7) 陈述部分有had better + v. 疑问句部分用hadn't you?
You'd better read it by yourself, hadn't you?
8) 陈述部分有would rather +v.,疑问部分多用 wouldn't +主语。
He would rather read it ten times than recite it, wouldn't he?
9) 陈述部分有You'd like to +v. 疑问部分用wouldn't +主语。
You'd like to go with me, wouldn't you?
10) 陈述部分有must 的疑问句,疑问部分根据实际情况而定。
He must be a doctor, isn't he?
You must have studied English for three years, haven't you? / didn't you?
He must have finished it yesterday, didn't he?
11) 感叹句中,疑问部分用用否定的助动词加sb/sth?如:
1)What a fine day it is today!
What a fine day it is today,isn“t it?
2)How fast he runs!
How fast he runs,doesn”t he?
3)What a long time we have been waiting!
What a long time we have been waiting ,haven“t we?[1]
12) 陈述部分由neither… nor, either… or 连接的并列主语时,疑问部分根据其实际逻辑意义而定。
Neither you nor I am engineer, are we?
13) 陈述部分主语是指示代词或不定代词everything, that, nothing, this, 疑问部分主语用it。
Everything is ready, isn't it?
14)陈述部分为主语从句或并列复合句,疑问部分有三种情况:
a. 并列复合句疑问部分,谓语动词根据邻近从句的谓语而定。
Mr. Smith had been to Beijing for several times, he should have been in China now, shouldn't he?
b. 带有定语从句,宾语从句的主从复合句,疑问部分谓语根据主句的谓语而定:
He is not the man who gave us a talk, is he?
He said he wanted to visit Japan, didn't he?
c. 上述部分主句谓语是think, believe, expect, suppose, imagine等引导的定语从句,疑问部分与宾语从句相对应构成反意疑问句。
I don't think he is bright, is he?
We believe she can do it better, can't she?
15) 陈述部分主语是不定代词everybody, anyone, somebody, nobody, no one等,疑问部分常用复数they,有时也用单数he。
Everyone knows the answer, don't they? (does he?)
Nobody knows about it, do they? (does he?)
16) 带情态动词dare或need的反意疑问句,疑问部分常用 need (dare ) +主语。
We need not do it again, need we ?
He dare not say so, dare you?
当dare, need 为实义动词时,疑问部分用助动词do + 主语。
She doesn't dare to go home alone, does she?
17) 省去主语的祈使句的反意疑问句,疑问部分用will you。
Don't do that again, will you?
Go with me, will you / won't you ?
注意: Let's 开头的祈使句,后用shall we?
Let us 开头的祈使句,后用will you?
Let's go and listen to the music, shall we?
Let us wait for you in the reading-room, will you ?
18) 陈述部分是"there be"结构的,疑问部分用there省略主语代词。
There is something wrong with your watch, isn't there?
There will not be any trouble, will there?
19) 否定前缀不能视为否定词,其反意疑问句仍用否定形式。
It is impossible, isn't it?
He is not unkind to his classmates, is he?
有些动词如:cost hurt hit put 等,它们的过去时与原型相同,在肯定句中一定要先弄清楚它们是什么时态:
20)The skirt made of silk cost you a lot of money,( )?
A.didn't it B.didn't you
C.doesn't it D.don't you
句中主语是the skirt,排除 B D,主语是三单,可断定cost是过去时,所以选 A 。
更多:http://baike.baidu.com/view/1656124.htm
(若不懂请追问,若满意请及时采纳)

因为前一句中的动词时be动词,后一句中的动词时do,而反义疑问句需要用动词的否定形式来反义,故得以上的形式,懂了请采纳,不懂再追问,谢谢!

她一定是个老师,谓语 系动词be
一定在工作 谓语 动词 do


农安县13382209261: - She must be in red. No, - ----. She wears a green coat. -
储阙天存: 选C.句子意思:——她一定是穿着红色衣服.——不,我认为不是这样.她穿着绿色外套.按照句子意思,直接排除A,D; 选项B,must不能用在否定句中表示肯定推测判断,而只能用于肯定句中,因此用法错误,排除.祝你开心如意!

农安县13382209261: 英语:I think she must be a teacher, - --?怎么写?为什么啊? -
储阙天存: isn't she 因为前面是肯定,所以后面是否定,要用not 相反,如果前面是否定,那后面就是肯定了 至于用IS不用MUST是因为反义疑问句反问的是宾语(也就是SHE),不反问情态动词,记住就行了,这是普遍规律 如果还有不懂得,问哦

农安县13382209261: she must be a teacher.(改为反意疑问句) -
储阙天存: She must be a teacher,isn't she?注释:当must表示“推测”时,意为“肯定,一定”,其反意疑问句要根据must后面的词,而不用must本身.

农安县13382209261: "She must be at least forty ."为什么要在must前加be? -
储阙天存: 这名话的最简原型是“She is forty ”就是说“她四十岁”也就是“主语+be 动词+谓语”,而说“她至少有四十岁”,可以说是“She is at least forty”must 是为了加强语气的.

农安县13382209261: i think he must be a teacher,isn't he ? 这句反义疑问句为什么这样变? -
储阙天存: 这个问题嘛...应该这样回答:我直接告诉你吧,must be是表现在推测的,表现在推测知道什么意思吧,must be 一定 may be 可能 can't be不可能 .以上三个就是表现在推测的标志.凡是表现在推测的,肯定就都用isn't 否定就用is 给你点列句吧...

农安县13382209261: 2. I think she must be our new teacher, - ------? -
储阙天存: 你好. 1 首先,must在这里是表猜测的,解释为“肯定,一定”,不解释为“必须”. 2 再看看 she must be our new teacher的原始句子: she must be our new teacher== I am sure she is our new teacher. 3 这样一来 I am sure 是插入语成分,你...

农安县13382209261: she must be at least thirty five years old.in ma opinion she - --- -
储阙天存: 本题的答案在问题本身,看上半句"She must be..."这里用的是be,而不是”She must has...".所以看题干猜出是is.其次,英国人的习惯说年龄的时候表达的是一个客观事实,用be动词,例如 I am ten,这点需要特别记忆.但就我所知,“我有10岁了”这种用法不止中国人有,法语里面也是这样的,比如“J'ai dix ans".

农安县13382209261: she must be amy 's mother.为什么要用be -
储阙天存: 你好,很高兴在这里回答你的问题:.must后用动词原形,所以be

农安县13382209261: must be后加动词的什么形式must be后不是应该加动词原形么 为什么书上是she must be making a movie为什么用making呢 -
储阙天存:[答案] must be 后面可接名词,形容词,介词短语;如果接动词,动词必须采用ing形式或过去分词.如:He must be a student.(接名词)He must be from America.(接介词短语)She must be watching TV at home.(接动词ing形式...

农安县13382209261: 求Groove Coverage - She 中文谐音歌词 -
储阙天存: she hangs out every day near by the beach 她每天在沙滩边上闲逛 having a harnican falling asleep 手中拿着啤酒(海涅根)就这样进入梦乡 she looks so sexy when she's walking the sand 她在沙滩上走路的姿势如此性感 nobody ever put a ring...

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