图片[1]-must 和 have to 的区别有哪些?-小e英语课堂-英语翻译_ 英语语法基础知识大全_英语手抄报_英语作文

must 和 have to 的区别
must 含强烈说话者的决意(表示主观的看法) have to 则表外力环境或习惯所使然(即表示客观的必要,作“不 得不”解)在口语中 have got to 可代替 must。 You must obey your parents.
你必须服从父母亲。
My father is ill. I have to stay at home to take care of him. 我父亲病了,我必须(不得不)留在家里照顾他。
注意
must 的时态 过去式:had to(但在间接引语中可用 must)。 将来式:shall (will) have to No, you needn’t.(No, you don’t have to.) 不,你不必。
You mustn’t go. =Don’t go 你不能走。别走。
I thought I must help him. 我想我必须帮助他。
Last week we had to have a party for her. 上周我们不得不给她开个晚会。
Next year you will have to finish your schooling. 明年我将不得不(必须)结束你的学业了。
They have had to answer the same question three times. 他们已不得不三次回答这同一个问题了。
2.表示推测
must在用于表示推测的句子中,一般用于肯定句。它的肯定程度比 may,might 要大得多,一般译为“肯定”。 a.对于现在状态的推测 主语+ must +V.(状态动词或系动词) He must be in his office for he called me from there five minutes ago. 他现在肯定在他的办公室里,因为他五分钟前刚从那儿给我打来了
电话。
Listen. There must be some children in the room. 听,房间里肯定有一些孩子。
b.对于现在动作的推测 主语+ must + be +现在分词(行为动词) Put on more clothes. You must be feeling cold with only a shirt on. 多穿点儿衣服,你只穿一件衬衣,肯定觉得冷。
Mr. Li must be cleaning the room.
李先生肯定在打扫房间呢。
c.对于过去事实的推测 主语+ must +have +过去分词
说明
You must not (mustn’t⋯) 等于否定的祈使句。
比较
道义上的必要时,用 ought to do sth.
I feel I ought to speak out. 我感觉我应当说出来。
必背!
must +原形动词
对现在的推测
must +have +过去分词
对过去的推测
must be +现在分词
对将来或现在正在⋯的推测
The road is wet. It must have rained last night. 路是湿的,昨天晚上肯定下雨了。
I didn’t hear the phone. I must have been asleep. 我没听见电话铃响,我肯定睡着了。
I rang your flat yesterday. A man answered but I didn’t recognize the voice. 昨天我给你单元(家)打电话,一个人接了电话,但我没听出来是
谁的声音。
Oh, it must have been my brother Peter. 哦!那一定是我哥哥彼得。
注意
must have +过去分词若用于虚拟语气的主句中时,可表与过去事实 相反。
You must have caught the bus if you had got up earlier. 如果你早一点起床,你一定赶上那一班公共汽车。
(事实上没有赶上公共汽车)

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