Oye, algunas están mal...
Were you hase fast Sunday? ¿Hase que es?

Was y yesterday in this class?
Supongo que es "I"
Entonces es:
Yes, i was in class yesterday
No, I wasn't, I was on the coffe shop.

We're they in New York last week?
Yes, they were in New York last week
No, they weren't, they were in California

Was she in class last month?
Yes she was, she went to all the classes
No, she weren't because she was sick