The boy who/that helped me lives next door.
The book which/that is lying on the floor is not yours.
The girl who/that is sitting next to you is very clever.
The room which/that faces the street is very noisy.
The women (who/that) we saw at the cinema is Pisti’s wife.
The women you were sitting next to is my sister-in-law.
The woman we talked to yesterday is the boss’s lover.
The book (whic/that) I lent you is Joe’s.
The book I wrote my essay on is very boring.
The book you had been looking for was behind the wardrobe.
This is the woman about whom I’ve already told you.
This is the book about which I told you.
The doctor who wrote this book got a Nobel prize.
Dr. Smit, who wrote this book, got a Nobel prize.
My sister who lives in Canada got married.
My sister, who lives in Canada, got married.
My sister, who you also like, got married.
My sister, who you also played a lot with as a child, got married.
Your new book, which I have also read, is very exciting.
Your new book, which I’ve also heard a lot about, has become a best-seller. / Your new book, about which I’ve also heard a lot, has become a best-seller.
This is the girl whose flat burnt down.
This is the place (where) I met her.
This is the reason (why) I am angry.
The year (when) I met her was terrible.
Monica, whose knee has sprained, is at home now.
Venice, where I met her, is very romantic.
1999, when I met her, was a terrible year.
This house, the owner of which is abroad, will be pulled down.
Everything that I bought was useless.
What I bought was useless.
I can’t understand the word that you have just said.
I can’t understand what you have said.