几岁

• how old

例句

1. 这个女孩几岁开始走路的？
   How old was the baby when she started to walk?
2. 约翰几岁？他一岁。
   How old is John? He is one year old.
3. 你几岁？我十二岁。
   How old are you? I am twelve (years old).
4. 你的姊妹几岁？她十三岁。
   How old is your sister? She is thirteen years old.
5. 你几岁了？
   How old are you?