AFIRMATIVAS
1) i was at the mall yesterday
2) you were at the part last saturday
3) i was born on october 11th
4) i was in new york last summer
5) we were at library ten minutes ago
NEGATIVAS
1) i wasn't at the mall yesterday
2) you weren't at the party last saturday
3) i wasn't born on october 11th
4) i wasn't in new york last summer
5) we weren't at library ten minutes ago
INTERROGATIVAS
1) was i at the mall yesterday?
Yes, i was
2) were you at the party last saturday?
No, you weren't
3) was i born on october 11th?
Yes, i was
4) was i in new york last summer?
No, i wasn't
5) were we at the library ten minutes ago?
Yes, we were
espero te ayude.