Step-by-step explanation:
1. Everyone waits for the meeting to begin when a message arrives.
2. If it rains, we'll go to play tennis instead.
3. "Why did you do the washing up?" "Because I want to help you."
4. If I were not so busy, I would show you how to write an essay.
2. "You look very different now. Did you get a haircut?" "Yes, I have." "Who cut it?" "My mother did it for me."
6. I don't know Helen's husband. I've never met him.
7. I didn't eat much at Gabriel's birthday party because I already ate at home.
8. My brother said he would get home late, so we didn't wait for him to come.
9. My husband doesn't watch television very often. He prefers reading.
10. A lot of people are helped by John Milton, who was a millionaire.
11. "How many times have you read this book?" "This is the first time I have read it."
12. Will you go to the cinema if the tickets cost 100 pounds?
13. "Sorry. We are late." "That's okay. I didn't wait long."
14. I am so upset! My coat was torn by my dog.
15. David looks so different. When you see him, you will not recognize him.
16. The village post office burned down three years ago.
17. Victor always arrives at school early.
18. "You are so dirty! What did you do?" "I watered the plants in the garden."