Раскройте скобки, выбрав правильное грамматическое время:

1. He (to write) books since he was a young man. 2. What you (to do) here since morning? 3. She (to help) her mother since morning. 4. He (to run) for ten minutes without any rest. 5. They (to work) there for three hours already. 6. I (to read) for about an hour when he (to come). 7. He (to teach) at school for five years when the war (to break) out.

He had been writing books since he was a young man. 2. What have you been doing here since morning? 3. She has been helping her mother since morning. 4. He has been running for ten minutes without any rest. 5. They have been  working there for three hours already. 6. I had been reading for about an hour when he came. 7. He had been teaching at school for five years when the war broke out.