2: "What time is it?"
Could you tell me the time?
Could you tell me what time is it?

3: "What time does the train leave?"
Could you tell me what time does the train leave?
Could you tell me what time the train leaves?

4: "Did you go to the bank yesterday?"
Could you tell me did you go to the bank yesterday?
Could you tell me if you went to the bank yesterday?

5: "Have you been to university?"
Could I ask if you've been to university?
Could I ask have you been to university?

6: "How long have you been studying English?"
Could I ask you how long you have been studying English?
Could I ask you how long have you been studying English?

7: "Has the 5pm train already left?"
Do you know has the 5pm train already left?
Do you know if the 5pm train has already left?

8: "Are you married?"
Can I ask are you married?
Can I ask if you are married?

9: "Do you have any children?"
Can I ask if you have any children?
Can I ask have you got any children?

10: "When is Holy Week??"
Do you know when is Holy Week?
Do you know when Holy Week is?