The girl singing in the next room is Tom's sister.

The girl who is singing next to the room is Tom's sister

Could you lend me the book you read yesterday? Can you lend me the book that you read yesterday?

I like the gift you gave me.

I like the present you send me

This is the bag my mother bought a few days ago. This is the bag my mom bought yesterday

This is the girl with the nice voice. This is the girl whose voice is very nice

Everyone who knows him wants to make friends with him. People who have known him are all willing to make friends with him

7. The boy named John was late for school yesterday

The boy named John was late for school yesterday