4. It’s very boring to talk to Jill.

=> Jill’s very boring to talk to.
5. We have known each other for two years.

=> It’s two years since we knew each other.
6. Don’t leave those boys alone.

=> Those boys not to leave alone.
7. A man I know told me about it.

=> I was told about it by a man I know.
8. TC company has promised my son a good job.

=> My son has been promised a good job by TC company.