Напишите краткую форму (she's / we aren't и т. д.).

Решение:

Нужно преобразовать полные формы глагола 'to be' в краткие.

1. she is — she's
2. they are — they're
3. it is not — it isn't
4. that is — that's
5. I am not — I'm not
6. you are not — you aren't

Ответ: 1. she's; 2. they're; 3. it isn't; 4. that's; 5. I'm not; 6. you aren't.