Monday, October 8, 2012

Should / ought to / must have + past participle

October 8, 2012

The structure should / must / ought to have + past participle is used to say what one thinks was essential. You should have locked the door before leaving the house. (= You did not lock the door before leaving the house, though that was very important.) They should not have raised the price of […]

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Free Grammar Guide: "120 Deadly Grammar and Vocabulary Mistakes."