1. They have never teached English before.

2. I hope seeing you again soon.

3. The guy with a beard didn't say me anything.

4. I don't feel so well. I think I will vomit.

5. My parents have seen the Eiffel Tower in 2009.

6. You should take this job serious!

7. Before sell my car, I had to give it a good clean.

8. Less people smoke nowadays.

9. I very rarely drive in night.

10. Can a dolphin recognise it's reflection?

ANSWERS BELOW! ⬇️ 

1. They have never (teached) taught English before.

2. I hope (seeing) to see you again soon.

3. The guy with a beard didn't say (me) anything to me.

4. I don't feel so well. I think I (will) am going to vomit.

5. My parents (have seen) saw the Eiffel Tower in 2009.

6. You should take this job seriously!

7. Before (sell) selling my car, I had to give it a good clean.

8. (Less) Fewer people smoke nowadays.

9. I very rarely drive (in) at night.

10. Can a dolphin recognise (it's) its reflection?