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So, we don't have "can have + PP" in English, do we? but we do have "can't have +PP", don't we?

Modal verbs like can, could, may, might,.... are very difficult & arbitrary. According to this site: can't have + past participle: I'm fairly sure this wasn't true Ex: She can't have ...
Tom's user avatar
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0 votes
2 answers
442 views

Usage of 'can't'

Please look at this sentence: " I can't do the fourth and fifth questions but I have done all the other questions" is this correct? Because in first part present tense is used with the usage of "do"...
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9 votes
5 answers
5k views

Is the structure "can have verb-ed" possible?

I have seen and heard sentences like these: He could have gone too far. John can't have eaten all the cake. But I don't seem to encounter this structure: She can have done the work. I tried ...
KSS's user avatar
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