Question

2. I have been studying since morning.
Present continuous
Present perfect
Present perfect continuous
3. I have finished the task assigned to me.
Present perfect
Past perfect
Simple past
4. Who broke the window?
Simple past
Present perfect
Past perfect
5. What were you doing then?
Past continuous tense
Present continuous tense
Past perfect tense

Answer 1

$\huge\star\sf\blue{ANSWER}\star$

2) I have been studying since morning.

= Present Perfect Continuous Tense.

3) I have finished the task assigned to me.

= Present Perfect Tense.

4) Who broke the window?

= Simple Past Tense.

5) What were you doing then?

= Past Continuous Tense.