Correct: I've lost my keys. I can't find them anywhere, I've bought a new car. You must come and see it., I'm looking for Mike. Have you seen him?, 'Have you been to Paris?' 'Yes, many times?', I'm very hungry. I haven't eaten much today, Incorrect: Have you eaten a lot of sweets when you were a child?, I've bought a new car last week, Where have you been yesterday evening?, Maria has left school in 1999, When have you been born?,

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