同义句转换：Who is your math teacher?

同义句转换：Who is your math teacher?
1.Who is your math teacher?
Who () () math?
2.Let me help you learn English.
Let me help you ( ) your English.
3.He buys his son a toy car.
He buys a toy car ( ) his son.
4.Can you play the piano well?
( ) you ( ) ( ) ( ) the piano?