| 词组 | ought to have |
| 释义 | must have • had to • should have/ought to have - I didn't know you'd been so ill. You should have told/ought to have told me. (Not *must have told* *had to tell*) (i.e. it was your duty to do this, but you didn't do it) - James could see I wasn't well, so I had to tell him about it. (Not *must have told*) (had to for 'inescapable obligation' in the past: I did tell him about it) - Here's a note from Colin. He must have called while we were out. (Not *had to call*) (must have + past participle for deduction) |
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