Окончанием: причастие наст. врем - ing, причастие прошед. времени - ed (для правильных глаголов). У неправильных глаголов свои формы причастия прошед. времени.
1. It isn't a mouse.
2. They aren't horsed.
3. You aren't a teacher.
4. It isn't a bird.
5. Pam isn' t a baird.
6. Paul isn't at home.
7. They aren't friends.
8. You aren't doctors.
Здесь группировка происходит по признаку, что можно взять, а что можно открыть.
Ручку книгу и. т. д. можно взять: Take a pen, a book, a rubber, a ruler, a bag, an exersise-book.
А окно, библиотеку и. т. д. можно открыть: Open the window, a bookcase, a pencil-case, a door.
Надеюсь помог. Удачи:)))
2.Did you watch the horror film last night?
Yes, but I didn't enjoy it.
3. Did your neighbours move house yesterday?
Yes, we helped them move their boxes.
4. A train crashed last night.
I know. Luckily, all the passengers survived.
5. Susan didn't play tennis yesterday.
6.Did you see Kate yesterday?
Yes. We had lunch together.