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Anonymous Posted 9 years ago
Grammar

Can't/can't have

I'm sure Peter hasn't finished reading that book. He only started it one hour ago.

Should I say 'Peter can't have finished or can't finished reading this book. He only started it one hour ago.' to give the same meaning as the previous sentence?

Thanks

  

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3 Answers
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Could anyone answer, please?
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AnonymousShould I say 'Peter can't have finished or can't finished reading this book.

Say "can't have finished".

"can't" must be followed by the plain form of a verb, so "can't finished" is not correct (though "can't finish" might be correct in a different sentence).

CJ

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Thank you very much. I got it.
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