Meaning: Know of something or someone's existence
Example: I've HEARD OF the band, but don't know their music.
Meaning: Receive news, updates or information about someone
Example: I have HEARD nothing OF them since they moved house.
Meaning: In the negative, this can mean that someone refuse to accept, allow or acknowledge something
Example: I said it would be a positive step, but she wouldn't HEAR OF it.
We have 4 phrasal verbs with 'HEAR'