Choose only the correct form

1. We [is playing|are playing|am playing] outdoors.
2. The singer [sung|singed|sang] a magnificent song in the opera house.
3. Susan [has written|has wrote|has write] a poem to her boyfriend.
4. If I [am|was|were] you, I would move to London.
5. Where [have|has|did] you [go|been|went]?
6. Andy [run|runs|rans] so fast.
7. Elisa [is trying|is tring|is try] to cook a delicious salad.
8. She [doesn't|didn't|not] understand you correctly yesterday.