考点4 情态动词+have done的用法 【典例】1. (2015·福建高考)—Sorry, Mum! I failed the job interview again.
—Oh, it’s too bad. You________have made full preparations.
A. mustB. canC. wouldD. should 【解析】选D。答语后句句意: 你本该做好充分准备的(实际上未准备好)。should have done本应该做而事实上没做; must have done一定做过某事; can have done可能做过某事; would have done表示对过去情况的虚拟。 2. (2015·天津高考)I______have worried before I came to the new school, for my classmates here are very friendly to me.
A. mightn’t B. mustn’t C. needn’t D. couldn’t 【解析】选C。句意: 来新校前我本没有必要担心的, 因为这里的同学都对我很友好。needn’t have done本没有必要做某事。 3. (2016·陕西高考)My book, The House of Hades, is missing. Who ________ have taken it?
A. need
B. must C. should D. could 【解析】选D。句意: 我的书《哈迪斯之屋》不见了, 谁有可能拿走了呢? need需要; must必须, 表猜测时翻译为“一定”, 只能用于肯定句中; should应该; could表示推测时, 常用于否定句或疑问句中, 翻译为“有可能”。 4. (2016·浙江高考)I ________ myself more—it was a perfect day.
A. shouldn’t have enjoyed B. needn’t have enjoyed C. wouldn’t have enjoyed D. couldn’t have enjoyed 【解析】选D。句意: 我玩得再开心不过了——这是完美的一天。D项表示不可能做过……, 这里是用比较级的否定形式表示最高级的意思, 故选D。
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