Question

1. Experts ( to test) new devices at the moment.
2. Yesterday I (not to see) him.
3. I always to help my friends.
4. My little sister ( to go) to school next year.
5. Peter just (to return) from his shipboard training​

Answer 1

1 are testing

2 didn't see

3 help

4 will go

5 has returned

Answer 2

1 are testing

2 didn't see

3 I always help my friends.

4 will go

5 Peter has just returned from his shipboard training.