hear，hear of，hear from的用法和区别
hear 和hear of 都可解作"听说",
hear 后面接宾语从句。hear 还可作"听见","听到"解,后面可以接名词,代词+不带to的不定式(或分词)的复合结构。
i heard him just now.
i heard him singing in the next room.
i have heard of him.
i was shocked to hear of his poor death.
but that may not be the last canadians hear of it.
doing this keeps you in people's minds and lets them respond quickly if they hear of anything that might help you.
how often do you hear from your father?