must与have to的区别,过去完成时与过去时的区别.quick
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must与have to的区别,过去完成时与过去时的区别.quick
must与have to的区别,过去完成时与过去时的区别.
quick
must与have to的区别,过去完成时与过去时的区别.quick
must命令 强制口气
have to是不得不,很勉强
过去完成时是说 在现在看来,过去的事情已经做完了,完成了
过去时只强调过去的动作,不管它是否完成.
have to和must 区别:
1) 两词都是'必须'的意思,have to 表示客观的需要, must 表示说话人主观上的看法,既主观上的必要。
My brother was very ill, so I had to call the doctor in the middle of the night. 我弟弟病得很厉害,我只得半夜里把医生请来。(客观上需要做这件事)
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have to和must 区别:
1) 两词都是'必须'的意思,have to 表示客观的需要, must 表示说话人主观上的看法,既主观上的必要。
My brother was very ill, so I had to call the doctor in the middle of the night. 我弟弟病得很厉害,我只得半夜里把医生请来。(客观上需要做这件事)
He said that they must work hard. 他说他们必须努力工作。(主观上要做这件事)
2) have to有人称、数、时态的变化,而must只有一种形式。但must 可用于间接引语中表示过去的必要或义务。
He had to look after his sister yesterday.
3) 在否定结构中: don't have to 表示"不必"
mustn't 表示"禁止",
You don't have to tell him about it. 你不一定要把此事告诉他。
You mustn't tell him about it. 你一定不要把这件事告诉他。
4) must表示推测,have to不可以
1' must用在肯定句中表示较有把握的推测,意为"一定"。
2' must表对现在的状态或现在正发生的事情的推测时, must 后面通常接系动词be 的原形或行为动词的进行式。
You have worked hard all day.You must be tired. 你辛苦干一整天,一定累了。(对现在情况的推测判断)
He must be working in his office. 他一定在办公室工作呢。
过去完成时与过去时的区别:
1)一般过去时表示过去时间发生的动作或存在的状态;
He went home yesterday. 他昨天回家了。
过去完成时表示在过去某一时间或动作之前己完成的动作或状态,即“过去的过去”,常与by,before等表示过去的介词短语连用。强调过去某一动作发生在另一动作之前时,常用过去完成时。如:
He had gone home when I got to his office. 当我到他的办公室时,他早已回家了
By the end of last term-we had learnt about 1,500 English words. 到上期期末,我们已学了大约1500个英语单词。
2)在连词before,after引导的从句中,由于连词本身的意义己说明主句和从句两个动作先后发生的关系,两个动作都可以用一般过去时,有时也可用过去完成时,强调动作的完成。如:
After he had arrived in England, Marx worked hard to improve his English.马克思到英国后,他努力学习以提高英语水平。
He went on watching TV. after his father (had) left. 他父亲走后,他继续看电视。
Marx had learnt some English before he got to England. 马克思到英国之前就学过一些英语。
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must和have to 都可以用做情态动词,后面直接接动词原形
must:是必须的意思
must:
(1) aux. 必须,需要
word to tell someone what to do,word that tells what is necessary
[例句]
We must be going no...
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must和have to 都可以用做情态动词,后面直接接动词原形
must:是必须的意思
must:
(1) aux. 必须,需要
word to tell someone what to do,word that tells what is necessary
[例句]
We must be going now.
我们现在得走了。
Mistakes must be criticized.
有错误就得批评。
She mustn't see the film,must she?
她不该看这部电影,是不是?
I must finish the work before I leave.
我走之前一定要把这件工作做完。
(2) aux. 不许,绝对不可
(must not)be not allowed to
[例句]
You may look at it, but you must not touch it.
你可以看,但不许摸它。
Passengers must not cross the line.
乘客止步。
(3) aux. 必定,一定
be certain or probable to
[例句]
He must be there by now.
他现在一定在那里啦。
They must be anxious to know the particulars.
他们一定急于知道详细情况。
I must be dreaming!
我一定是在做梦吧!
You must have known who I am.
你一定知道我是谁。
He must have gone away,since the house is deserted.
住宅荒芜,他肯定已经离去了。
Someone must have been using it. The cover is off.
准是有谁用它来着,盖子取下来了。
(4) n. 绝对必要
something is necessary
[例句]
Good health is a must for builders of socialism.
一个健壮的身体对一个社会主义建设者来说是何等重要。
His attendance is a must.
他的出席是绝对必须的。
have to:是不得不的意思
过去完成时与一般过去时的区别
区别:
1)一般过去时表示过去时间发生的动作或存在的状态;
He went home yesterday. 他昨天回家了。
过去完成时表示在过去某一时间或动作之前己完成的动作或状态,即“过去的过去”,常与by,before等表示过去的介词短语连用。强调过去某一动作发生在另一动作之前时,常用过去完成时。如:
He had gone home when I got to his office. 当我到他的办公室时,他早已回家了
By the end of last term-we had learnt about 1,500 English words. 到上期期末,我们已学了大约1500个英语单词。
2)在连词before,after引导的从句中,由于连词本身的意义己说明主句和从句两个动作先后发生的关系,两个动作都可以用一般过去时,有时也可用过去完成时,强调动作的完成。如:
After he had arrived in England, Marx worked hard to improve his English.马克思到英国后,他努力学习以提高英语水平。
He went on watching TV. after his father (had) left. 他父亲走后,他继续看电视。
Marx had learnt some English before he got to England. 马克思到英国之前就学过一些英语。
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谈论某种依谈话的人或听话的人而定的义务must用的最多,have to一般用于谈论某种来自外界的义务.I must stop smoking.
You have to see the boss.等.提问中must是询问对方的愿望.
过去时与现在一点关系也没有,而完成时就是强调事情发生对现在的影响,过去完成时就是"过去的过去"...
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谈论某种依谈话的人或听话的人而定的义务must用的最多,have to一般用于谈论某种来自外界的义务.I must stop smoking.
You have to see the boss.等.提问中must是询问对方的愿望.
过去时与现在一点关系也没有,而完成时就是强调事情发生对现在的影响,过去完成时就是"过去的过去"
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must [简明英汉词典]
[mQst; mEst]
aux.必须, 应当, 很可能, 一定, 必须, 肯定, 可以
have to [简明英汉词典]
[have got to] 不得不, 只好
简单的说must主观上必须做的,自己本人要求的,“必须”,但是have to有客观性,表示不得不。
对 我上面那层楼的说的没错
MUST是主观的 我想这必须去做
HAVE TO 是我可以不做但我被迫必须去做撒