Replace the nouns by the personal pronouns in the Nominative or Objective Case.
1. The girls are playing tennis. 2. I saw the girls in the park. 3. Put the books on
the shelf. 4. The books are on the shelf. 5. We saw the film yesterday. 6. The film is very
interesting. 7. My sister studies at school. 8. I am waiting for my sister. 9. We listened to
the teacher with great interest. 10. The teacher explains a new grammar rule.

Хорошо, давай разберем каждое предложение по очереди и заменим существительные на соответствующие личные местоимения в именительном или объектном падеже.

1. The girls are playing tennis.
- They are playing tennis.

2. I saw the girls in the park.
- I saw them in the park.

3. Put the books on the shelf.
- Put them on the shelf.

4. The books are on the shelf.
- They are on the shelf.

5. We saw the film yesterday.
- We saw it yesterday.

6. The film is very interesting.
- It is very interesting.

7. My sister studies at school.
- She studies at school.

8. I am waiting for my sister.
- I am waiting for her.

9. We listened to the teacher with great interest.
- We listened to him with great interest.

10. The teacher explains a new grammar rule.
- He explains a new grammar rule.

Надеюсь, это помогло. Если у тебя есть какие-либо вопросы, не стесняйся задавать!