The present perfect continuous questions

[nez]

I've read the discussion I need some help with The present perfect continuous, yet I have some questions.
1.If I ask my student in music school who has a lesson with me once a week about his practicing (at home), what would be correct:
a. Have you been practicing (exercising) on this passage? (I mean - for the last week)?
b. or: Have you practice on this passage?
c. or just: Did you practice on this passage?

In each case I'm interested about the last week practicing only.

2.If I'm interested in the particular amount of time he/she's playing the certain piece, what would be correct:
a. How long have you been playing this piece?
b. or: How long have you played this piece?

Thank you in advance
nez

[Rusty]

I've read the discussion I need some help with The present perfect continuous, yet I have some questions.
1.If I ask my student in music school who has a lesson with me once a week about his practicing (at home), what would be correct:
a. Have you been practicing (exercising) on this passage? (I mean - for the last week)?
b. or: Have you practice on this passage?
c. or just: Did you practice on this passage?

In each case I'm interested about the last week practicing only.

2.If I'm interested in the particular amount of time he/she's playing the certain piece, what would be correct:
a. How long have you been playing this piece?
b. or: How long have you played this piece?

Thank you in advance
nez
1.If I ask my student in music school who has a lesson with me once a week about his practicing (at home), what would be correct:
a. Have you been practicing (exercising) on this passage? (I mean - for the last week)? (You are suggesting that your student has been practicing regularly, perhaps every day).
b. or: Have you practiced on this passage? (This is OK. The meaning is the same as c.).
c. or just: Did you practice on this passage?

In each case I'm interested about the last week practicing only. (In the context of your weekly lesson, you will both understand that you mean only the previous week. If you were talking about some other time in the past, only c. would be right. Example: Did you practice this passage before your rehearsal?)

2.If I'm interested in the particular amount of time he/she's been playing the certain piece, what would be correct:
a. How long have you been playing this piece?
b. or: How long have you played this piece?
(This does not refer to the student's practice sessions. It refers to the number of weeks/months/years that the student has known and played the piece (on various occasions). If you want to know how much time he/she has put into practice during the previous week, ask: How much time did you spend practicing each day? How long were your practice sessions? How much time did you practice this particular piece?)