hear “ 听到；听见 ”（表示直接听说）如：
I heard him singing in the next room.
I heard that he was singing in the next room.
句译：我听见他在隔壁唱歌.
hear of “ 听说 ”（表示从别人那里间接）
I have never heard of that man.
句译：我从未听说过那个人.heard 也听说的意思吧，就像i never heard that对！但 hear of 表示从别人那里听说，是“间接听说”的意思。 希望你能采纳！