His father had warned him to expect this sort of thing.

My father warned them against her with his dying breath.

His father had warned him to stay out of politics.

"Your father warned you not to come in his last letter."

His father warned him about the dangers of military life.

My father warned me that life was not in books.

His father had warned him of what might happen, but not about how he would feel.

But it is still a world in which his father warns him "never to play with white children."

His father had warned him, but he could not stop.

However, the father also warns the son not to become involved with women as he is much too young.