ex4
1 have started
2 has explained
3 have helped
4 has given
5 have looked
6 have finished
ex 5
1 has helped
2 were talked
3 has started
4 have helped
5 has visited
6 has given
ex4
1 have started
2 has explained
3 have helped
4 has given
5 have looked
6 have finished
ex 5
1 has helped
2 were talked
3 has started
4 have helped
5 has visited
6 has given