ought to should 区别

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oughttoshould区别oughttoshould区别oughttoshould区别oughtto：它比must语气弱,但婉转.Theyoughttobetherebynow.他们现在一定到那了

ought to should 区别
ought to should 区别

ought to should 区别
ought to ：
它比must语气弱,但婉转.
They ought to be there by now.他们现在一定到那了
一般用于肯定和否定句
ought 与不定式构成谓语动词.主要用法如下：
（ 1 ）表示应该做某事.例如：You ought to take his advice.你应当接受他的劝告.
（ 2 ） ought + 不定式的完成形式,表示本应该做某事.
例如：They ought to have handed in the paper yesterday.
他们本应当昨天交论文.
should ：
表示说话人的猜测,估计应该
That should be Janet coming upstairs now.正在上楼的准是珍妮特.
多用于第一人称.
should
(1) 表示劝告或建议.例如：He should learn how to drive the car.
(2) 表示预测或可能.例如：This kind of reference book should be in the reading-room.
(3) 表示惊奇、愤怒、失望等感情.例如：Why should I go?我干吗要去?
(4) should + 动词的完成形式,表示应该已经做某事.例如：I should have thought of that.
(5) should + 动词的进行形式,表示应该正在做某事.
例如：You should be reading a textbook instead of the novel.
你现在读的应当是一本教科书而不是那本小说

ought语气强烈
should语气较委婉

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