Mike became a father. He felt a strong sense of responsibility towards his parents. A. Were Mike to become a father himself, he would feel a strong sense of responsibility towards his parents

Were Mike to become a father himself, he would feel a strong sense of responsibility towards his parents.

Only after Mike had become a father himself did he feel a strong sense of responsibility towards his parents.

Had Mike become a father himself, he would have felt a strong sense of responsibility towards his parents.

Not until he felt a strong sense of responsibility towards his parents did Mike become a father himself.