Have you ____what happened to him?

Have you ____what happened to him? what happened to him? He happened to have some money with him. He’s late.What ____ have happened to him? What do you suppose has happened to him? Do you know what was happened to him. Have you spoken to him? I wrote a letter to the car dealer ,____what had happened to do you know what happened with him ?/to him? with 还是to? what happened to you what I have been with yo No matter what ( )happened to you.用have还是has When you called me this morning ,I happened to have