Расскройте скобки таким образом, чтобы предложения выражали а) реальное условие, б) нереальное условие настоящего времени.

1a. If I know, l will tell you. 1 b. If i knew, I would tell you.2a. If she wants to talk she will ring up. 2b. If she wanted to talk she would ring up.3a. Her health will improve if she sleeps longer. 3b. Her health would improve if she slept longer. 4a. If he has enough money, he will buy a large house. 4b. If he had enough money he would buy a large house.5a. She will feel lonely if Peter goes out every evening. 5a. She would feel lonely if Peter went out every evening.6a. We will be pleased to see you if you arrive. 6b. We would be pleased to see you if you arrived7a. If we can come on Sunday, we will come. 7b. If we could come on Sunday, we would come.8a. I will understand Mr. Smith if he speaks slowly. 8b. I would understand Mr. Smith if he spoke slowly.