关于英语倒装句、So do I、So I do、So I am、So am I 分别用在什么情况中?

1)- Do you like films?
- So I do(,== Yes,I like films,) So do many other people (==MANY OTHER PEOPLE LIKE FILMS TOO.).
2) - Did you see the film
- So I did.So did Tom.
3) - Are you a student?
- So I am.So is my brother.
4) - Have you seen the play?
- So I have.So have my classmates
5) - Will you see the play?
- So I will.So will my friends.
6) -Was Tom at home then?
- So he was.So were his parents.
-----------会了吗?-------