Some questions about grammer in English
1. He has died.
2. He has died for five years.
3. He has died since five years ago.
4. He was dead five years ago.
5. He has died five years ago.
Which ones are correct? and why others are wrong ?
Thank you.

Question

Answer

You only die once
! "He has died effectively the present tense. " could be used in a hospital to give the bad news to a relative. After that moment he has died. But after that moment he is dead.
2 he doesn't continue to die for five years "he died five years ago"
3 He died five years ago. No need for since 
4 Technically this phrase could, in rare instances,  be correct. eg Mr A  could be lying in court that he met Mr X five years before. But the lawyer may have checked and found that Mr X has been dead for more than 5 years  so the lawyer could say that Mr A could not have met Mr X five years ago  because "he was dead five years ago".
5 Either he has died (present tense). or "he died" past tense. He can't have just died now, five years ago.

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