3. 1. I've been writing
2. I've been dreaming
3. were been thinking
4. we've been talking
4. how long has she been speaking to the teacher
how long have you been trying to phone me
what have you been doing
how long has been Bob practising the piano
5. I've been trying
They've been discussing
I've been tidying
She has been feeling
6. 0-e
1-c
2-b
3-d
4-a
