`1. `Bao isn't old enough to drive a car.
- Cấu trúc enough to
- S + be (not) + enough + (for sb) + to + V-inf + ...
`2.` In the past my hair used to be much shorter than that now.
- adj-er + than
- used + to V-inf
`3.` I'll give you a call tomorrow morning.
- Thì TLD - DHNB: tomorrow morning
- give sb a call = telephone sb