IV.
1.would have gone
2.spoke
3.would you do
4.would have performed
5.will give
6.would have
7.hadn't missed
8.would go
9.hadn't stolen/wouldn't be
10.had invited/would be
11.will go/is
12.had been/would have gone
13.hears
14.doesn't do
15.rings
16.won't
17.comes
18.would have bought