我爱可卡2001
幼苗
共回答了20个问题采纳率:90% 举报
一、了解相互间关系
had better(最好),should(应该)与ought to(应该)均为提建议、阐述观点的情态动词,其后接动词原形.should 比had better语气强,ought to语气最强.一般情况下should与ought to可通用.
例1:You had better go there at once.你最好立即去那里.
例2:You ought to / should work hard.你应该努力工作.
值得注意的是:should还有"竟然"之意,表出乎意料.
例:You can't imagine that a well-behaved gentleman should be so rude to a lady.你真是难以想象这么一个有风度的先生对一个女子是如此之粗鲁.
二、 掌握句型变换方法
had better,should,ought to作为情态动词,各种句型变换均在自身形式上作变化.
(一)否定句
had better,should,ought to用于否定句时,否定词均位于其后,具体形式为:had better not do,shouldn't / should not do,oughtn't to do.
例1:You had better not start at this time.此时你最好别出发.
例2:He shouldn't be careless in class.他上课时不应粗心.
例3:She oughtn't to waste time.她不应该浪费时间.
(二)一般疑问句
had better,should,ought to用于一般疑问句时,分别将had,should,ought提至句首.
例1:Had he better start early at once?他最好立即出发吗?
例2:Should you do like this?你应该这么做吗?
例3:Ought he to go there?他应该去那里吗?
(三)反意疑问句
陈述句谓语动词含had better,should,ought to时,反意疑问句为:had,should与ought+主格人称代词或hadn't,shouldn't,oughtn't+主格人称代词.
例1:You had better not go home,had you?你最好别回家,是吗?
例2:You should study hard,
shouldn't you?你应该认真学习,是吗?
例3:He oughtn't to speak in class,ought he?你上课不应该讲话,是吗?
三、 掌握其完成式用法
had better没有完成式,should与ought to完成式意义与用法完全相同.
(一)should/ought to have done 意为本来应做但实际没有做,表达遗憾的感情色彩.
例:There was a lot of fun at yesterday's party.You ________ come,but why didn't you?
A.must have B.should C.need have D.ought to have
析:答案D.该空含你本来应来但实际未来之意,应填ought to have.
(二)should / oughtn't to have done,意为本来不应做但实际已做,表达遗憾的感情色彩.
例:I was really anxious about you.You ________ home without a word.
A.mustn't leave
B.shouldn't have left
C.couldn't have left
D.needn't leave
析:答案B.该空含你本不应该一句话不说就离开家但实际已这么做之意,所以应填shouldn't have left.
1年前
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溪湖煮酒
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求ought to否定句的回答肯定和否定两种回答,是Yes,I ought to.还是Yes,I ought.