Переведи на Английский

Краткий ответ: здесь нужен Present Continuous — действие происходит сейчас.

1. Are they playing in the yard?
2. Nina and Ann are washing the floor.
3. Nick is helping his mother.
4. Are you helping your father?
5. My sister is reading an interesting book about life in France in the 17th century.
6. They are going to school.
7. Are you going to school?
8. Are you wearing jeans today?
9. Is your grandmother baking pies?
10. He is buying sweets for his grandchildren.
11. What is your sister doing?
12. Mr Parker’s grandchildren are waiting for him impatiently.
13. Why are you laughing at me?
14. Where are they going?
15. Why are you calling your mother?
16. Are your friends coming with us? (также возможно: Are your friends going with us?)

Как понять принцип:

• Утверждение: подлежащее + am/is/are + глагол с -ing
  Nick is helping his mother.

• Общий вопрос: Am/Is/Are + подлежащее + глагол с -ing?
  Is Nick helping his mother?

• Специальный вопрос: What/Where/Why + am/is/are + подлежащее + глагол с -ing?
  What is your sister doing?

Важно: в Present Continuous не используются do/does.
Сравни:

• What is your sister doing? — что она делает сейчас;
• What does your sister do? — что она делает вообще, например по профессии.

Проверка: в каждом переводе есть am/is/are и у смыслового глагола окончание -ing.