by the time he is 60, he will visited many countries
Dear anonymous, try and use the word "please" when you wish to be helped with your English. "Correct the sentence" sounds as if you are ordering the teachers/members here to do that for you. Please correct the (following) sentence is much better: - By the time he is 60, he will have visited many countries.
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Dear anonymous, try and use the word "please" when you wish to be helped with your English. "Correct the sentence" sounds as if you are ordering the teachers/members here to do that for you.