英语情态动词用法总结(完整)
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3、should作为情态动词,可以表示谦逊、客气、委婉之意,译为“可……”、“倒……”。例如:I should say that it would be better to try it again.
4、should作为情态动词,可以用来表示意外、惊喜或者在说话人看来是不可思议的.尤其在以why, who, how等开头的修辞疑问句或某些感叹句中常常译为“竟会”、“居然”。例如:How should I know it ?我怎么会知道这件事?
2、should作为情态动词,可以用在条件状语从句中,表示语气较强的假设,译作“万一”、“竟然”,这时也可将should置于从句之首,即将should放在主语前面,而省略从属连词if。例如:If you should fail to come, ask Mrs Chen to work in your place.(= Should you fail to come, askMrs Chen to work in your place.)
—Don’t count on it too much. It ________ break down and you’d better make a copy of them.
A.mustB.can
C.shouldD.will
【答案】B
【解析】
【详解】
考查情态动词。句意:——有一台计算机来储存照片真是太棒了。——不要过度依赖它。它有时候也会出故障,你最好做一个备份。计算机出故障这是可能的事情,表示客观可能性用can。must肯定,必须;should应该;will表意愿。故B选项正确。
Somebody must have stolen the ring.肯定有人偷了这枚戒指. [该句所推断的偷窃动作发生在过去.]
The temperature must have dropped to below zero last night, because the water is frozen all over.昨夜的温度肯定降到零度以下,因为水都冻住了。
I guess the poet would have been about twenty when she wrote her first poem.
Another worker wouldn't have acted like that.
3.It is really cold and the ground is wet; it ________ have rained last night.
【点睛】
情态动词+ have done结构:
1.“must + have +过去分词”表示对过去发生的事情或状态进行推测,语气比较坚定,通常只用于肯定句。如:It must have rained last night,for the ground is wet.
2.“can / could + have +过去分词”表示对过去某种情况的怀疑或不确定。can和could一般用于否定句和疑问句,could的语气较can弱。如:He can't have finished the work so soon.
9.—________ the woman with the baby come over? We have a seat here.
—Thank you, sir. Actually I do have my seat here. But my baby likes to look out of the window.
5、should作为情态动词,可以用来表示有较大可能实现的猜测、推论,通常译为“可能”、“总该……吧”,相当于be expected to。例如:They should be home by now, I think.我想现在他们总该到家了吧。
6、should作为情态动词,用在由so that, for fear that, lest引导的目的状语从句和in case(that)引导的条件状语从句中,有“能够”、“可能”、“会”之意。例如:They got up early so that they should(= could/ might)catch the first bus in time.
6.One of our rules is that every student _______ wear school uniform while at school.
A.mightB.could
C.shallD.will
【答案】C
【解析】
【详解】
考查情态动词辨析。句意:我们其中一条规则要求每个学生在校期间都要穿校服。shall可以表示“命令,警告,强制要求;允诺;法律,规定要做……”,结合句意可知C正确。
中国学生的常见病句是:They...; they certainly have arrived.病句的句义是“他们当然已经到达了。”(这不是对过去的肯定推测,而是断定动作已经完成。)
4.—It’s really great to have a computer to store my photos.
3.“may / might + have +过去分词”表示对已发生的动作或存在的状态进行不肯定的推测,might的语气比may弱一点。这种结构主要用于肯定句和否定句,疑问句改用can或could。如:They may not have known it beforehand.
4.“need + have +过去分词”表示过去做了不必做或不需要做的事情,或过去做某事纯属多余。如:I needn't have bought so much wine—only five people came.
5.The room is so clean. He ________ have cleaned it yesterday evening.
A.willB.need
C.canD.must
【答案】D
【解析】
【详解】
考查情态动词表推测。句意:房间如此干净,他一定是昨天晚上打扫过了。must have done表示对过去发生的事情有把握的猜测,意思是“一定(做过)”,故D项正确。
A.should theyB.they should
C.dare theyD.they dare
【答案】A
【解析】
【详解】
考查部分倒装和情态动词。句意:这位教授警告学生们,在他的课堂上,决不应该使用手机。on no account意为“决不”,否定词放在句首,句子使用部分倒装,排除B、D项;这里表示应该,故选A。
考查情态动词。句意:我们不应该把拥有洁净的饮用水看作是理所当然的。也许有一天,我们会用完它。shouldn't“不应该”,符合句意。needn't不必;can't不可能;won't将不。故选D。
2.The accident which left 15 people on board dead ________ if both the angry female passenger and the bus driver had kept calm.
A.mightB.must
C.canD.should
【答案】B
【解析】
【详解】
考查情态动词辨析。句意:天气很冷而且地面是湿的,昨晚一定下了雨。根据上文the ground is wet可知,“昨晚下了雨”是肯定的,故用must have done“必定做了……”表示对过去十分有把握的推测,故选B。
【点睛】
7.It wasn’t right to me that such near neighborsnot know one another.
A.couldB.would
C.shouldD.might
【答案】C
【解析】
【详解】
考查情态动词。句意:对我来说,很不正常,如此近的邻居居然不认识。A. could可能,能够;B. would将;C. should竟然;D. might可能,也许。should作为情态动词,可以用来表示意外、惊喜或者在说话人看来是不可思议的,常常译为"竟会"、"居然",住的这么近的邻居居然不认识。表示意外,所以答案选C。
7、should作为情态动词,可以用于下列虚拟语气句中:
(1)用在表示与将来事实相反的条件状语从句中,构成“ If …… should(do sth)……, …… would/ could/ might(do sth.)…… ”句式。
(2)用在suggest(propose), arrange, plan, decide, advise, order, demand, request, desire, insist等表示“建议”、“要求”、“命令”、“决定”、“安排”、“计划”、“主张”的动词后面接的宾语从句中。这里的should也可以省略。
must have done用法辨析
must have done:表示对过去的肯定的逻辑推测,推定某件事情、动作或状态可能在过去发生过(存在过)。
He must have been a doctor, for he knows medicine so well.他过去肯定是一位医生,他对医学如此了解。
本句中should作为情态动词,可以用来表示意外、惊喜或者在说话人看来是不可思议的,常常译为"竟会"、"居然",住的这么近的邻居居然不认识。表示意外,所以答案选C。
8.The professor warned the students that on no account ________ use mobile phones in his class.
5.“should / ought to + have +过去分词”表示过去本该做某事但没做,其否定式表示过去不该做某事但做了,这种句式含有不满或责备之意,ought to的语气比should强一些。如:
You ought to / should have studied harder.你本应该更努力学习的.(但没有)
【点睛】
should的用法
1、should作为情态动词,通常用来表示现在或将来的责任或义务,译作“应该”、“应当”,这时它可以和ought to, be supposed to互换使用.例如:You should(= ought to)tell your mother about it at once.
A.should have avoidedB.should be avoided
C.could have avoidedD.could have been avoided
【答案】D
【解析】
【详解】
考查“情态动词+完成式”。句意:如果愤怒的女乘客和巴士司机保持冷静,这起导致15人死亡的事故本来是可以避免的。could have done“本来能做而没有做”,且句子主语The accident和谓语动词avoid之间是被动关系,结合wk.baidu.com意可知答案为D。
如果“must + have +过去分词”句型与by now连用,还可以表示对现在完成的动作和状态的肯定推测,但实质上还是指所推测的过去的动作。例如:
They started early this morning; they must have arrived by now.他们今晨很早就出发了,现在肯定已经到了。
He oughtn't to / shouldn't have done that.他本来就不该做那件事.(可是做了)
6.“would+have+过去分词”表示对过去的某种情况进行猜测,或本来要做某事却因某种原因未做成,通常用来说明某一情况,但不像用should或ought to那样含有责备之意。如:
英语情态动词用法总结(完整)
一、单项选择情态动词
1.We ________ take clean drinking water for granted. One day we may run out of it.
A.needn'tB.can't
C.won'tD.shouldn't
【答案】D
【解析】
【详解】
A.WouldB.Shall
4、should作为情态动词,可以用来表示意外、惊喜或者在说话人看来是不可思议的.尤其在以why, who, how等开头的修辞疑问句或某些感叹句中常常译为“竟会”、“居然”。例如:How should I know it ?我怎么会知道这件事?
2、should作为情态动词,可以用在条件状语从句中,表示语气较强的假设,译作“万一”、“竟然”,这时也可将should置于从句之首,即将should放在主语前面,而省略从属连词if。例如:If you should fail to come, ask Mrs Chen to work in your place.(= Should you fail to come, askMrs Chen to work in your place.)
—Don’t count on it too much. It ________ break down and you’d better make a copy of them.
A.mustB.can
C.shouldD.will
【答案】B
【解析】
【详解】
考查情态动词。句意:——有一台计算机来储存照片真是太棒了。——不要过度依赖它。它有时候也会出故障,你最好做一个备份。计算机出故障这是可能的事情,表示客观可能性用can。must肯定,必须;should应该;will表意愿。故B选项正确。
Somebody must have stolen the ring.肯定有人偷了这枚戒指. [该句所推断的偷窃动作发生在过去.]
The temperature must have dropped to below zero last night, because the water is frozen all over.昨夜的温度肯定降到零度以下,因为水都冻住了。
I guess the poet would have been about twenty when she wrote her first poem.
Another worker wouldn't have acted like that.
3.It is really cold and the ground is wet; it ________ have rained last night.
【点睛】
情态动词+ have done结构:
1.“must + have +过去分词”表示对过去发生的事情或状态进行推测,语气比较坚定,通常只用于肯定句。如:It must have rained last night,for the ground is wet.
2.“can / could + have +过去分词”表示对过去某种情况的怀疑或不确定。can和could一般用于否定句和疑问句,could的语气较can弱。如:He can't have finished the work so soon.
9.—________ the woman with the baby come over? We have a seat here.
—Thank you, sir. Actually I do have my seat here. But my baby likes to look out of the window.
5、should作为情态动词,可以用来表示有较大可能实现的猜测、推论,通常译为“可能”、“总该……吧”,相当于be expected to。例如:They should be home by now, I think.我想现在他们总该到家了吧。
6、should作为情态动词,用在由so that, for fear that, lest引导的目的状语从句和in case(that)引导的条件状语从句中,有“能够”、“可能”、“会”之意。例如:They got up early so that they should(= could/ might)catch the first bus in time.
6.One of our rules is that every student _______ wear school uniform while at school.
A.mightB.could
C.shallD.will
【答案】C
【解析】
【详解】
考查情态动词辨析。句意:我们其中一条规则要求每个学生在校期间都要穿校服。shall可以表示“命令,警告,强制要求;允诺;法律,规定要做……”,结合句意可知C正确。
中国学生的常见病句是:They...; they certainly have arrived.病句的句义是“他们当然已经到达了。”(这不是对过去的肯定推测,而是断定动作已经完成。)
4.—It’s really great to have a computer to store my photos.
3.“may / might + have +过去分词”表示对已发生的动作或存在的状态进行不肯定的推测,might的语气比may弱一点。这种结构主要用于肯定句和否定句,疑问句改用can或could。如:They may not have known it beforehand.
4.“need + have +过去分词”表示过去做了不必做或不需要做的事情,或过去做某事纯属多余。如:I needn't have bought so much wine—only five people came.
5.The room is so clean. He ________ have cleaned it yesterday evening.
A.willB.need
C.canD.must
【答案】D
【解析】
【详解】
考查情态动词表推测。句意:房间如此干净,他一定是昨天晚上打扫过了。must have done表示对过去发生的事情有把握的猜测,意思是“一定(做过)”,故D项正确。
A.should theyB.they should
C.dare theyD.they dare
【答案】A
【解析】
【详解】
考查部分倒装和情态动词。句意:这位教授警告学生们,在他的课堂上,决不应该使用手机。on no account意为“决不”,否定词放在句首,句子使用部分倒装,排除B、D项;这里表示应该,故选A。
考查情态动词。句意:我们不应该把拥有洁净的饮用水看作是理所当然的。也许有一天,我们会用完它。shouldn't“不应该”,符合句意。needn't不必;can't不可能;won't将不。故选D。
2.The accident which left 15 people on board dead ________ if both the angry female passenger and the bus driver had kept calm.
A.mightB.must
C.canD.should
【答案】B
【解析】
【详解】
考查情态动词辨析。句意:天气很冷而且地面是湿的,昨晚一定下了雨。根据上文the ground is wet可知,“昨晚下了雨”是肯定的,故用must have done“必定做了……”表示对过去十分有把握的推测,故选B。
【点睛】
7.It wasn’t right to me that such near neighborsnot know one another.
A.couldB.would
C.shouldD.might
【答案】C
【解析】
【详解】
考查情态动词。句意:对我来说,很不正常,如此近的邻居居然不认识。A. could可能,能够;B. would将;C. should竟然;D. might可能,也许。should作为情态动词,可以用来表示意外、惊喜或者在说话人看来是不可思议的,常常译为"竟会"、"居然",住的这么近的邻居居然不认识。表示意外,所以答案选C。
7、should作为情态动词,可以用于下列虚拟语气句中:
(1)用在表示与将来事实相反的条件状语从句中,构成“ If …… should(do sth)……, …… would/ could/ might(do sth.)…… ”句式。
(2)用在suggest(propose), arrange, plan, decide, advise, order, demand, request, desire, insist等表示“建议”、“要求”、“命令”、“决定”、“安排”、“计划”、“主张”的动词后面接的宾语从句中。这里的should也可以省略。
must have done用法辨析
must have done:表示对过去的肯定的逻辑推测,推定某件事情、动作或状态可能在过去发生过(存在过)。
He must have been a doctor, for he knows medicine so well.他过去肯定是一位医生,他对医学如此了解。
本句中should作为情态动词,可以用来表示意外、惊喜或者在说话人看来是不可思议的,常常译为"竟会"、"居然",住的这么近的邻居居然不认识。表示意外,所以答案选C。
8.The professor warned the students that on no account ________ use mobile phones in his class.
5.“should / ought to + have +过去分词”表示过去本该做某事但没做,其否定式表示过去不该做某事但做了,这种句式含有不满或责备之意,ought to的语气比should强一些。如:
You ought to / should have studied harder.你本应该更努力学习的.(但没有)
【点睛】
should的用法
1、should作为情态动词,通常用来表示现在或将来的责任或义务,译作“应该”、“应当”,这时它可以和ought to, be supposed to互换使用.例如:You should(= ought to)tell your mother about it at once.
A.should have avoidedB.should be avoided
C.could have avoidedD.could have been avoided
【答案】D
【解析】
【详解】
考查“情态动词+完成式”。句意:如果愤怒的女乘客和巴士司机保持冷静,这起导致15人死亡的事故本来是可以避免的。could have done“本来能做而没有做”,且句子主语The accident和谓语动词avoid之间是被动关系,结合wk.baidu.com意可知答案为D。
如果“must + have +过去分词”句型与by now连用,还可以表示对现在完成的动作和状态的肯定推测,但实质上还是指所推测的过去的动作。例如:
They started early this morning; they must have arrived by now.他们今晨很早就出发了,现在肯定已经到了。
He oughtn't to / shouldn't have done that.他本来就不该做那件事.(可是做了)
6.“would+have+过去分词”表示对过去的某种情况进行猜测,或本来要做某事却因某种原因未做成,通常用来说明某一情况,但不像用should或ought to那样含有责备之意。如:
英语情态动词用法总结(完整)
一、单项选择情态动词
1.We ________ take clean drinking water for granted. One day we may run out of it.
A.needn'tB.can't
C.won'tD.shouldn't
【答案】D
【解析】
【详解】
A.WouldB.Shall