Complete the sentences with the correct form of the verbs

1. Pete remembers
   [ ] his best friend for the first time.
2. Our grandparents never let us
   [ ] in the yard alone when we were kids.
3. What kind of troubles do you always tend
   [ ] about?
4. My friend learnt
   [ ] when he was 22.
5. What's the next step we need
   [ ]?
6. Sam has never tried
   [ ] any extreme sports.
7. We would never risk
   [ ] out and leaving the door unlocked.