A; What did you did in the week-end?
B: On saturday i WENT to an exhibition.... . And we BOUGHT some things... .
A: What did you BOUGHT?
B: ...What did you do last week-end?
A: I haven't done anything ... . I WENT to the cinema... .
B: What have you seen?
A: We SEEN Batman vs Oh .., and we MET Julia. Then we HAD a hamburger.