打字猴:1.70479156e+09
1704791560
1704791561 (7)must not 是表禁止( Prohibition)的。其反对语为 may.
1704791562
1704791563 You must not go.(你不可以去。)(允许去时说 You may go.)
1704791564
1704791565 You must not sit here talking.(你不要坐在这里聊天。)
1704791566
1704791567
1704791568
1704791569
1704791570 英文疑难详解 [:1704787081]
1704791571 英文疑难详解 91.must 和 have to 的分别
1704791572
1704791573 英文的助动词 must,只有现在形,过去要用 had to 代替,但 had to 的现在形为 have to;这样一来,便有了两个现在形了,不知这两个现在形,在用法上有何分别?
1704791574
1704791575 【解答】同为现在形的 must 和 have to,在一般的情形上是通用的,不过用 have to 的场合较多,尤其是在美国。
1704791576
1704791577 You must (或 have to)do as you are told.(你一定要照着吩咐的做。)
1704791578
1704791579 We must (或 have to)sell our house.(我们必须卖去我们的房子。)
1704791580
1704791581 I am sorry to say that for unavoidable reasons we shall have to (或 must)dispense with your services from next year.(由于不可避免的理由,从明年起我们无法继续请你帮忙,十分抱歉。)
1704791582
1704791583 I always have to (或 must always)work hard.(我必须经常努力。)
1704791584
1704791585 这二者在用法上的差别:用 have to 是表示客观的必要,用 must 是表示主观的必要,如说:
1704791586
1704791587 I have to go to the airport to see him off.(我必得到机场送行〔因为他是我的顶头上司〕。)
1704791588
1704791589 I must go to the airport to see him off.(我必得到机场送行〔因为他是我最好的朋友。〕)
1704791590
1704791591 用于否定时,二者在意义上也有很大的分别,如:
1704791592
1704791593 You have not to say that.(你用不着那样说。)
1704791594
1704791595 You must not say that.(你决不可那样说。)
1704791596
1704791597 第一句的 you have not to say=you need not say;第二句的 you must not say=you are not allowed to say.
1704791598
1704791599 还有 have to 的否定有两种表现法,一则加用 do,一则不加 do,指常习的事情用 don’t have to,指特定的场合用 haven’t to,例如:
1704791600
1704791601 We don’t have to work on Saturday afternoons.(通常在星期六下午我们不上班。)
1704791602
1704791603 We haven’t to work this afternoon,because it’s Saturday.(因为是星期六,今天下午不上班。)
1704791604
1704791605 宾语放在不定词的前后都是一样:
1704791606
1704791607 I have a letter to write.或 I have to write a letter.(我有一封信要写。)
1704791608
1704791609
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