‘-어하다/아하다/여하다’ is used to change an adjective to a verb. This grammar point can only be used with a third person subject. Unless the verbs ‘좋아하다’ or ‘싫어하다’ are used, which can be used in first person context.
● 그 소식을 듣고 마이클 씨가 슬퍼했어요. (Michael was sad when hearing about the news.)
● 엄마는 뱀을 무서워해요. (My mom feels scary of snakes.)