That three-years-old boy is very forward (knows alrealy a lot of things)
- thằng bé sớm biết so với tuổi: this child is very forward for his age
- thằng bé mới mười bốn tuổi mà khó bảo quá: The boy is only fourteen but already very self-illed
- thằng bé tám tuổi: an eight-year-old boy
