（A）I ought ____ those books back to the library last week. A. take B. to take C. have taken D. to have taken
(B) My sister ____ here by now, for she took the early train. A. must arrive B. can arrive C. may arrive D. ought to have arrived. (日本高考英语试题)
上面两道题都要求选 D(ought to + 完成时不定式)。但上列两道题中的 ought to + 完成时不定式所表达的意义似乎不同。请详析。
ought to + 完成时不定式一般可表达两种完全不同的含义。
A. 表示“本应该做，而实际没有做某事”，相当于 should + 完成时不定式。有时含有“责备”
“批评”等含义：
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I ought to have left London before 9. (LEG) 我本应该在9点以前离开伦敦。
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I ought to have phoned Ed this morning, but I forgot. (BEU) 我今天上午本应该给埃德打电话，但我却给忘了。
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I ought to have helped her, but I never could. (Snow) 我本应该帮助她，但我却总是爱莫能助。
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She ought to have had more consideration for you. (Shaw) 她本应当给你更多的关照。
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A policeman approached Jimmy and told him he ought to have gone along a side-street as Jumbo was holding up the traffic. (New Concept English, Book 2, L.65) 一位警察前来对吉米说，他们本应该走小巷，因为大象江波有碍交通。
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They ought to have met her at the station. (CGEL) 他们本应该到车站去接她的。
oughtn't to have done 则表示“本不应当做某事，而事实上却做了某事”。
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You oughtn't have stopped on the motorway. 你本不应该在高速公路上停车的。
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She was very much depressed; I oughtn't to have told her the truth. 她非常忧愁；我本不该把实情告诉她。
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You ought not to have said such a thing. 你本不应该说这样的话。
B. 表示推论或推测某事已经发生, 含有说话人不能肯定其说法是否正确的含义 (请与 must have done 作对比):
If he had started at nine o'clock, he ought to have been in London by eleven o'clock. (Palmer) 如果他是九点钟出发的话，那他十一点钟该到达伦敦了。
请做下面的英语试题：
- You went to the wrong shop, You ought ____ to the shop next to the cinema, but you went to the shop by the Post Office.
A. go B. to go C. have gone D. to have gone(EPT)
- We ____ the letter yesterday, but it didn't arrive.
A. must receive B. must have received C. ought to receive D. ought to have received
- I'm very sorry for what has happened; the serious consequences ought to ____ out to those concerned at the very beginning.
A. point B. be pointed C. have pointed D. have been pointed
- Tom ought not to ____ me your secret, but he meant no harm.
A. have told B. tell C. be telling D. having told(全国高考,93-15)
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She is crying, you ought not to tell her the disappointing news so soon. (上海高考,90-45)
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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(上海高考,99-14)