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have done & have been doing

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twin*MD*soul

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Joined
Jan 9, 2008
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Hi, dear
I want you to tell What is the different between have done / have been doning
and can use the question How much with the present perfect tense? because I know that we can use how many / how long ? with present perfect
and can we use since with have been doing or only for .
How can I
Differentiate betwen these tenses
Is it correct this question How much have you seen/ read / found ?
I need the answer this night please.

Thanks
 
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