RELATIVES • I've got a friend. He collects stamps. • I've got a friend who collects stamp. • There’s a problem. It worries me. • There’s a problem which/that worries me. • Holly has lost the watch. I bought it for her. • Holly has lost the watch which/that I bought for her. • I've told you everything that (not which) I know. • It was the best film that (not which) I have ever seen. • This is the girl whom the teacher likes. • This is the woman with whom I travelled. • I’ll never forget the day when I first met you. • There’s a shop where you can buy salad. • The letter that I saw this morning is not on the table. • The letter I saw this morning is not on the table. • He had a simple idea that changes the world. • I gave him what he needed. (What = the thing that) • What I learned yesterday was easy. • I’ll buy anything that you need. (anything, something, nothing, everything, all, the only thing) • I saw a girl. Her bag was green. • I saw a girl whose bag was green. • A pen which you can write with. OR A pen with which you can write. • The girl who I was talking about. OR The girl about whom I was talking . • The person who I was looking at OR The person at whom I was looking • Leave out Who / which / that + is / are / was / were before (ing and ed forms) • The man (who was) standing near the door. • Letters (which were) posted at 10 o’clock. • He took out the tooth which was causing the trouble. • he reacted very badly, which was a real pity.