Нужна помощь с типами условных предложений. Измените предложения сообразно образчикам:If I

Нужна помощь с типами условных предложений. Измените предложения сообразно образцам:

If I were free, I should help you. Were I free, I should help you.
If he had known about the lecture, he would have come. Had he known about the lecture, he would have come.

1. If it were possible, we should begin this work at once.
2. If he had had all the necessary books, he would have мейд his report in time.
3. If the books had been available in our library, we could have done this work much earlier.
4. If there were no computers, space flights would be impossible.
5. If drivers were more attentive while driving, there would be less accidents on the road.

Заблаговременно благодарю!