Глагол to be так не склоняется. Там если я - то am, если она, он, оно - is, а если они, вы, ты, мы - are.
Примеры:
She is running
We are swimming
I am skiing
1. told, hadn't read
2. was, didn't go out
3. is standing, is answering
4. will have finished
5. will be still doing
6. is not, will not watch
7. was writing
8. asked, had had
9. were playing, came
10. goes
1.Famous writer.
2. Admire hero own
3. Write a novel
4.Big adventure
5.A flying kite
6.Written letter
7.Mark Twain was famous American writer
8.When he wrote a famous book about Tom Sawyer?
9.Mark Twain wrote about the adventures of Tom and his friends
10.The main heroes of his books were good and brave.
3) I went to the zoo last Saturday
4) Did you see the monkeys?
No, I (5) didn't, but I (6) saw the baby penguins. They were great! I even (7) fed them!
8) Did you take any photos?
Yes I (9) did. Look!