trouble someone about something—bother a person concerning smth.:
- I am sorry to keep troubling you about that letter, but until it is found I cannot answer it.
trouble someone for something—put a person to the inconvenience of doing or giving smth.:
- Could I trouble you for the newspaper, please?
trouble someone with something—worry smb. by bringing the matter in question before the person:
- He is always troubling me with some complaint or another.