Выполнить письменно упражнение, заполняя пропуски словами must / mustn’t

1. I help your mother.

2. I play with my little sister.

3. I be late for school.

4. I make your bed.

5. I eat in class.

6. I get up early.

7. I miss classes.

1. I MUSTN'T help your mother. (но тут спорно)

2. I MUST play with my little sister.

3. I MUSTN'T be late for school.

4. I MUSTN'T make your bed. (тут тоже не уверен, может вместо "your" нужно "my"? Такой же вопрос и к первому пункту)

5. I MUSTN'T eat in class