<span>1-my brother and I have been cleaning my room since 2 o'clock
2-we had already been cleaning our room for an hour when mum came home.
3-she said they had been building that house all that year
4-Have they been building their house all this summer?
5-how long has your brother been working as an engineer?</span>
Ответ:
How often does your dad go bowling?
My dad go bowling once a month
Does your grandad sometimes play chess?
Yes, he does
Do you sometimes do jigsaw puzzles?
Yes, I do
How often does your friend play video games?
My friend play video games every day
Ответ: 1. dates - а) показатель 3-го лица единственного числа глагола в Present Indefinite Active)
2. doors - б) признак множественного числа имени существительного
People's - в) показатель притяжательного падежа имени существительного
grown-ups. - б) признак множественного числа имени существительного
3. artists - б) признак множественного числа имени существительного
Объяснение: