which tense need using

[vthanhtrung]

Which sentence is right ?

What did you do during the last few weeks?
What have you been doing during the last few weeks?
What had you been doing during the last few weeks?
What were you doing during the last few weeks?
​

 

[David L.]

All of them.
They are tense forms of the verb 'to do'
Now I do,
Yesterday I did
I have done
I had done
I have been doing
I had been doing

for each, write a few sentences to show you understand when to use