Помогите, пожалуйста!!!

In the past:
1) The forest were green.
2) The trees were tall.
3) The houses were clean.
4) The animals were fine.
5) The birds were happy.
6) The animals and birds were kind.

Now:
1) The forest are black.
2) The trees are short.
3) The houses are dirty.
4) The animals are bad.
5) The birds are sad.
6) The animals and birds are angry.