Răspuns:
Ex. 3.
1. I've been writing
2. I've been dreaming
3. would've been thinking
4. we've been talking
Ex. 4.
1. How long has she been speaking to the teacher?
2. How long would've you been trying to phone me?
3. What would been doing?
4. How long would Bob been practising the piano?
Ex. 5.
b. I've been trying
c. They've been discussing
d. I've been tidying
e. She's been feeling
