1) doing, writing
2) writen
3) studying
4) learnt
5) teaching
6) taught
7) done
8) found
9) looking
10) talking
11) talked
12) said
13) telling
14) told
15) told
1) doing, writing
2) writen
3) studying
4) learnt
5) teaching
6) taught
7) done
8) found
9) looking
10) talking
11) talked
12) said
13) telling
14) told
15) told