I is used as the subject of a verb. In very formal English, I can be used after the verb ‘to be', especially before a relative clause: I用作动词的主语。在非常正式的英语中,I可用在动词to be之后,尤其是在关系从句之前:It is I who will suffer. 是我要遭罪了。
used for referring to yourself when you are the person speaking or writing 我;本人;笔者