1. How long has he been playing drums? He had been playing drums since he was six.
2. How long have we had that piano? We have had this piano for four months.
3. How long have they studied music? They have studied music for many years.
4. How long has Maria been working with the band? She has been working with the band since last year.(тут хз)
5. How long has that singer lived in New York? He has been living in New York since 2010.~~•~~
Ответ:
1. Can you help me with my English?
Yes, I can.
2. We must all have a good rest.
3. May I sit down?
Yes, you may.
4. I must study English hard because I want to read technical literature.
5. You can speak English at the lesson.
6. Can she go home now?
No, she can not because she has much work to do.
Объяснение:
Насчет 5 и 6 тут очень неоднозначно: ибо в 5 можно поставить и must - типа "ты должен говорить на английском на уроке", но и can подходит - ты можешь говорить. May в принципе тоже нормально, в стиле "тебе разрешается".
В 6 can - это обычная разговорная норма, которая подразумевает и разрешение тоже, но возможно здесь спрашивают именно про разрешение. Однако may будет резать слух и глаз.