How long have you lived in ha noi ?
→Where did you live in Hanoi
We have played games for 2 hous.
→We started playing games for 2 hours
The last time she came back to her hometown was 4 years ago.
→She hasn't come back to her hometown for 4 years
My sister began to learn english when she was six years old
→My sister has learnt English since she was six years old