For используются что бы подчеркнуть в течении какого времени происходит действие:
For example
I have lived here for 3 years - я живу здесь в течении 3 лет
Since используются что бы подчеркнуть с какого времени происходит действие:
For example
I have been styding French since I was 14 - я учу французский с 14 лет
Есть раковина на кухне? да есть. есть телевизор на кухне? нет нет
1. Is Emma going to be a pilot?
No, she isn't. She isn't going to be a pilot. She is going to be a vet.
2. Are Ann and Helen going to be actresses?
Yes, they are. They are going to be actresses.
3. Is Harry going to be a vet?
No, he isn't. He isn't going to be a vet. He is going to be a reporter.
4. What is Emily going to be?
Emily is going to be a teacher.
5. What are Dan and Sam going to be?
They are going to be pilots.