Question

Поставить предложения в вопросительную форму и дать ответ.
9)You have known his parents for many years.
10)Both sisters had already left when I returned.
11)Now machine has recently come from Germany.

Answer 1

9) Do you know his parents?
Yes, I have known them for many years

10) Did both sisters leave?
Yes, right when you returned

11) Where has machine come from recently?
From Germany

Answer 2

9) Have you known his parents for many years? Yes, I have.
10) Had both sisters already left when I returned? No, they hadn't.
11) Has the new machine recently come from Germany? Yes, it has.