1. went
2.I have seen
3.Frank has played
4.Bill has been
5.I have read
6.did
7.changed
8.learned
9. I have known, discovered
10. borrowed. haven't returned
1. went
2.I have seen
3.Frank has played
4.Bill has been
5.I have read
6.did
7.changed
8.learned
9. I have known, discovered
10. borrowed. haven't returned