1. met, went, drew, helped, asked, liked, was/were, visited
2. was; were; were; was
3.
We didn't visit Moscow last summer
Mary didn't ask Dan about this story
The girl didn't look sad and angry
4.
Strong-stronger-the strongest
Big-bigger-the biggest
Good-better-the best
Nice-nicer-the nicest
Happy-happier-the happiest
5. larger; bigger; taller