1)
1 eats
2 eating
3 saw
4 was eating
5 said
6 ate
7 will fall
8 eats
2)
1 were walking
2 talking
3 stopped
4 said
5 lost
6 don't find
7 will have
3)
1 came
2 learned
3 has already left
4)
1 was he doing
2 saw
5)
1 will give
2 finish
6)
1 had been crossing
2 broke
7)
1 have never heard
8)
1 have just wrote