He wrote the letter last week and posted it three days ago.改成一般现在时态和现在完成时态.要加时间状语!

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Hewrotetheletterlastweekandposteditthreedaysago.改成一般现在时态和现在完成时态.要加时间状语!Hewrotetheletterlastweekandpo

He wrote the letter last week and posted it three days ago.改成一般现在时态和现在完成时态.要加时间状语!
He wrote the letter last week and posted it three days ago.改成一般现在时态和现在完成时态.
要加时间状语!

He wrote the letter last week and posted it three days ago.改成一般现在时态和现在完成时态.要加时间状语!
一般现在时:He writes the letter and posts it.
现在完成时:He has written the letter and posted it.

He has written the letter for one week and posted it for three days.

一般现在时:the letter is that he wrote last week and posted three days ago .
现在完成时:the letter has been writen for a week and been posted for shree days .

一般现在时态:He writes the letter,and posts it.
现在完成时间:He has written the letter before one week ago,and has posted it before three days ago.