反义疑问句can

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反义疑问句can
【篇一:反义疑问句can】
1.can的反意疑问句一般要分两种情况来说.
2.can如果是表示“能力/许可/请求”等时,则直接以can来变即可.
如你的例子:he cant go to school today,can he?
例句中的can表示的就是能力的含义.
3.can如果表示可能性”,即翻译成“可能/不可能”,则与can无关,必须考查句子的具体时态和谓语动词形式,进行具体判断.
如你的第2/3个例子,can就是表示可能性的含义.
1)he cant work here now,does he?
翻译:他现在不可能在这儿工作,是吗?
方法:去掉can后,结合时间状语now,则句子正常写法为:
he doesnt work here now,does he?
2) he cant have done his work last night,did he?
翻译:昨晚他不可能做过他的工作,是吗?
方法:去掉can后,结合时间状语last night,则句子正常写法为:
he didnt do his work last night,did he?
4.如果上述情况中没有明确的时间状语,则根据句意可以加以适当变化.
如:he cant have been to the usa before,has he?
方法:去掉can,考虑到时间状语before,用现在完成时最好,即句子改成:
he hasnt been to the usa before,has he?
但是楼主给的第4个例句:
he cant have done his work,did he?/has he?
之所以是两种都可以,是因为去掉can后,没有具体明确的时间状语,所以句子可能变成:
1)he didnt do his work,did he?
也可能变成:
2)he hasnt done his work,has he?
【篇二:反义疑问句can】
情态动词有哪些及用法
情态动词 (model verbs) 又称为情态助动词 (model auxil-iaries), 主要有can, may, must, could, might, shall , should, will, would,
ought to, need, dare等(过去式更委婉哦!)。

情态动词与其他动词连用表示说话人的语气。

情态动词可表达建议、要求、可能和意愿等。

情态动词没有人称和数的变化。

情态动词部分重点测试以下内容:
(1)情态动词+动词完成式: must have done
(2)情态动词+动词进行式: must be doing
(3)情态动词+动词完成进行式: must have been doing
(4)某些情态动词的特殊用法: need
一、情态动词+动词完成式
情态动词+动词完成式即“情态动词+ have + done分词”,表示对过去行为或动作进行推测、评论或判断。

1. must have done
must have done 表示对过去某事的肯定猜测。

其否定或疑问形式都用can(could) 来表示.
例如: since the road is wet, it must have rained last night.
he can’t have missed the way. i drew him a map.
“the dictionary has disappeared. who could have taken it?”
当然对现在发生或将来发生的事情,要用must do 表示猜测, 否定为can’t do.
he must understand that we mean business.
you must be hungry after a long walk.
2.may / might have done
may / might have done 表示推测过去某事“也许”发生了.may 比might 表示的可能性在说话人看来稍大些。

例如:
i can’t find my keys. i may / might have left them at the school yesterday.
3. could have done 在肯定句型中, 往往用作委婉的批评. 本应该做什么,而没做; 有时也用作猜测.
you could have told us earlier.
tom could have taken the dictionary.
4. ought to / should have done和ought not to / shouldn’t have done
ought to / should have done 和ought not to / shouldn’t have done 用于对已发生的情况表示“责备”、“不满”,分别表示“本应该…”和“本不应该…”。

例如:
1)with all the work finished, i should have gone to the party last night.
2)you ought not to have made fun of him. he is not the one you laugh at but learn from.
5. needn’t have done
needn’t have done 表示过去做了某事,但没有做的必要,意为“本没必要…”。

例如:
you needn’t have waken me up; i don’t have to go to work today.
注:表示推测过去某动作发生的可能性时,就表示的可能性程度而言,must最大,could其次,may更次之,might最小。

例如:“i wonder how tom knew about your past.”
“he must / could / may / might have heard of it from mary.”二、情态动词+动词进行式
情态动词+行为动词进行式(即情态动词+ be + doing形式),表示推测或评论某动作现在是否正在进行。

例如:
1)he must be playing basketball in the room.
2)she may be staying at home.
三、情态动词+动词完成进行式
情态动词+行为动词完成进行式(即情态动词+ have been + v-ing 形式),表示推测或评论过去某动作是否正在进行或一直在进行。

例如:
1)they should have been meeting to discuss the problem.
2)he may / might have been buying stamps in the post office when you saw him.
四、某些情态动词的特殊用法
1. need
考试中主要测试 need 作情态动词与作实义动词的区别。

情态动词need与实义动词need 在时态、肯定、否定结构上的对比见下表。

时态情态动词need 实义动词 need
现在时
he need (needn’t) do
need he do….?
he needs (doesn’t need) to do
过去时
he needed (didn’t need) to do
将来时
he need (needn’t) do
need he do….?
he will (not) need to do
注: need 一般用于否定句或疑问句.
2. dare 考试中主要测试dare作情态动词和作实义动词的区别。

情态动词dare 与实义动词dare 在时态、肯定、否定、疑问结构上的对比见下表。

句型情态动词dare 实义动词 dare
肯定句
现在时 dare to 少用
过去时 dare to 少用
现在时 dare/dares to do
过去时 dared to do
否定句
现在时daren’t/dare not do
过去时 dared not do
现在时 do/does not dare (to) do
过去时 did not dare (to) do
疑问句
现在时 dare he do?
过去时 dared he do?
现在时 do you/does he dear (to) do?
过去时 did he dare (to) do
3. can 和 may
考试中主要测试can,may或could,might表示可能性的区别及对may构成的疑问句的回答。

(1)can, could, may, might都可以表示可能性.can, could表示潜在的可能性或理论上或逻辑判断上存在的可能性;而may, might 则表示事实上的可能性。

此外,can还具有“有能力”的意思,而may与might则不具此意。

例如:
according to the weather forecast, it may rain tomorrow.
any man with a little sense can see that he is wrong.
(2)may i / we …?这一类疑问句的肯定回答为yes, please.或certainly;否定回答为please don’t.或no, you mustn’t. 例如:“may we leave now?” “no, you mustn’t. you haven’t finished your home work yet.”
4. can 和 be able to
can 与 be able to 都可以表示能力,但两者在用法上有点差异:can (could)表示主观能力,不表示意愿,它的将来时用will be able to; be able to表示主观意愿,强调要克服困难去做某事。

例如:
1)my grandma is over seventy, but she can still read without glasses.
5. must 和 have to
must 和 have to 都可以表示“必须”,但有几点区别:
(1)must 强调“内在的职责”、“义务”,而have to 强调“外界压力”、“不得已而为之”。

(2)have to可用于多种时态,而must一般用于现在时,其过去
时与将来时分别由had to与shall / will have to代替。

(3)在回答must引起的问题时,如果是否定的答复,不能用mustn’t,而要用needn’t或don’t have to,因为mustn’t是“一定
不要”、“一定不能”的意思。

例如:
you must come to the classroom before eight.
2)it is raining hard outside, but i have to leave now.
3)“must we do it now?” “no, you needn’t.”
6. used to +do, be used to +doing和be used to +do
(1)used to +v意为“过去常常”,“过去一直”;be used to +v-ing / n(名词)意为“习惯于”;be used to +v意为“被用来(做某事)”。

(2)used to只表示过去,而be used to +v-ing / n可表示现在、
过去或将来。

例如:
1)he used to smoke. now he doesn’t.
2)he’s quite used to hard work / working hard.
3)the knife is used to cut bread.
7.用作情态动词的其他短语 would rather, would sooner, would (just) as soon, had rather, had better, had sooner, can not but, may (just) as well等可用作情态动词。

例如:
1)the soldier would sooner die than surrender.
2)the brave soldier would as soon die as yield to such an enemy.
3)i’d rather walk than take a bus.
4)if you don’t like to swim, you may just as well stay at home.注:这些短语后一般直接跟动词原形.would (had) rather, would (had) sooner, would (just) as soon后可跟that 引导的从句,that
常省去,从句要用虚拟语气。

对现在和将来的假设用过去时,对过
去的假设用过去完成时。

例如:
1)i would rather you came on sunday.
2)i would sooner you hadn’t asked
反义疑问句(the disjunctive question) 即附加疑问句。

它表示提问
人的看法,没有把握,需要对方证实。

反义疑问句由两部分组成:前一部分是一个陈述句,后一部分是一
个简短的疑问句,两部分的人称时态应保持一致。

1.陈述部分肯定式+疑问部分否定式可记为前肯后否
2.陈述部分否定式+疑问部分肯定式可记为前否后肯
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。

用法
he?他看上去不高兴,不是吗? the girl dislikes history,doesnt 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, wont 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。

(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, wont she/he? we suppose you have finished the project,
havent 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 dont believe that he can translate this book,
can he? wedont 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 havent.。

(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, doesnt she? you thought they could have completed the project, didnt you? they dont believe shes an engineer, do they? she doesnt 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have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dont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,doesnt he? =he has two sisters,hasnt he? -he
doesnt 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 wont you。

e.g. give me a hand,will you? leave all the things as they
are,wont you? 2)以lets开头的祈使句,前肯后可肯可否,前否后
只可,疑问句用shall we;以let us或let me开头的祈使句,问句用will you。

e.g. lets go out for a walk, shant we? let us go out for a walk,
will you? let me help you,will you? 3)当陈述句是否定的祈使句时,问句可用will you 或 can you 。

e.g. dont 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, arent there? there isnt 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)mustnt表
示“禁止,不可,不必”时,附加问句通常要用must. you mustnt 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neednt. they must finish the work today,neednt 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,isnt 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“didnt+
主语”或“wasnt/werent+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“havent/hasnt+主语”。

she must have read the novel last week,didnt she? 她上星期一
定读了这本小说,是吗? you must have told her about it,havent you? 你一定把这事告诉她了,是吗?
反意疑问句的回答用yes, no,但是,回答翻译相反,回答要按事实。

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 dont.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 dont. 对,他们工作不努力
【篇三:反义疑问句can】
题目中的can 表示猜测的意思,而你所说的can 是表示能力的意思。

两者是不一样的。

就像下面这个用法一样
must在表推测时,根据其推测的情况来确定反意疑问句。

he must be there now, isnt he?
it must be going to rain tomorrow, wont it?
道理是一样的
如果你用中文翻译这句话,他不可能是她父亲吧,回答肯定是对be
的回答,而你提出的例句:你不能做这件事吧,回答是你能不能。

这样好理解了吧。

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