Rewrite the sentences. Use the passive constructions. 1. She has already sent for the doctor. 2. They looked for this book last week. 3. We always laugh at their jokes. 4. He waited Ann for twenty minutes yesterday.

1. She has already sent for the doctor. - The doctor has already been sent for by her.

2. They looked for this book last week. - This book was looked for by them last week.

3. We always laugh at their jokes. - Their jokes are always laughed at by us.

4. He waited Ann for twenty minutes yesterday. - Ann was waited for twenty minutes by him yesterday.