should/ought to have done "本来该做某事"(而实际未做) should not/ought not to have done "本来不该做"(实际却做过了,含有责备语气) needn't have done "本来不必做"(但是已经做过了) would rather have done "当时宁愿做了某事"(实际没有做过);否定式would rather...
2. If I hadn’t been lucky enough to meet you. I really ___ what I would have done. A. don’t know B. hadn’t known C. wasn’t knowing D. wouldn’t know 3. “I’ve told everyone about it.”“Oh, I’d rather you ___.” A. don’t B. hadn’t C. couldn...
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) ...
4.would rather 宁愿;宁可 5.build up 逐渐增强;建立;开发 6.lead to 导致;造成 7.focus on 集中(注意力、精力等)于 8.keep...free from/of 使……免受(影响、伤害等);使……不含(有害物) 9.make a difference 造成差异,很重要 10.keep in mind 牢记在心 ...
1.should have done =ought to have done 本应该做而没做 2.would have done = 本来就会去做某事而没做 3.could have done = 本可以做某事而没做 4.might have done 本可以做而没做 例:They ought to have apologized. 他们本该道歉的。
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