http://www.eslbee.com/verb_tenses.htm

What do you do every day?
I feed my fish every day.
Simple present: verb in base form aux Do, Does

What did you do yesterday?
I fed my fish yesterday.
Simple Present Verb in simple past aux Did

What will you do tomorrow?
I will feed my fish tomorrow.
Sinple Future: Will + verb in base form

What are you doing right now?
I am feeding my fish right now.
Present continuous: To be + verb +ing

What were you doing at this time yesterday?
I was feeding my fish at this time yesterday.
Past Continuous: was/were + verb +ing

What will you be doing at this time tomorrow?
I will be feeding my fish at this time tomorrow.
Future Continuous: will + verb + ing

What have you done since you got up this morning?
I have fed my fish since I got up this morning?
Present Perfect: have+ Past Participle verb

What had you done before you went to bed last night?
I had fed my fish before I went to bed last night.
Past Perfect: Had + Past Participle verb

What will you have done before you go to bed tonight?
I will have fed my fish before I go to bed tonight.
Future Perfect: will + Past Participle verb

What are you doing?
I am feeding my fish.
Present Continuous

How long have you been doing that?
I have been feeding my fish for five minutes.
Present Perfect Continuous

What were you doing before you started this quiz?
I was feeding my fish before I started this quiz.
Past Continuous

How long had you been doing that?
I had been feeding my fish for five minutes before I started this quiz.
past perfect continuous

What will you be doing before you take this quiz tomorrow?
I will be feeding my fish before I take this quiz tomorrow.
Future Continuous

How long will you have been doing that?
I will have been feeding my fish five minutes before I take this quiz tomorrow.
future Perfect Continuous