부 정 사 (Infinitive) 1. 부정사의 용법 1) 명사적 용법 ① To keep early hours is good for health. ② She began to write a letter. I have nothing to do except to read. ③ All (that) he does is to complain. ④ 의문사 + to 부정사 = 명사구 --------+ | = 의문사 + S + should + Root | what to do | I don't know where to go. | when to go | = I don't know where I should go. | how to go +--------------------------------------+ ⑤ He has ..