Перевести на third contitional if she (prepare) for the exam, she (pass) it. if bill (see) the house, he (not buy) it. these words (roughly express) bob`s feelings, if he (be)capable of reasoning. but what (you do), if you (see) what i saw. it (be) all done though, if jill (help) at the righ time.

If she had prepared for the exam, she would have passed it.
If Bill had seen the house, he wouldn't have bought it.
These words would have roughly expressed Bob`s feelings, if he had been capable of reasoning.
But what would you have done, if you had seen what I saw?
It would have been all done though, if Jill had helped at the right time.