“害怕某人做某事”应该是使用be afraid of doing sth结构中动名词短语的复合结构即:be afraid of sb/one's doing sth.
其中的sb/one's即人称代词宾格/形容词性物主代词,如果是名词则用其普通格或所有格形式。
如:I'am afraid of him/his getting angry.
I'm afraid of Tom/Tom's getting angry.
我害怕汤姆生气。
afraid of sb. doing sth.
afraid sb to do sth