※ 형용사적 용법                        

① I have no friend to help me.

② He has no house to live in.

  = He has no house in which to live.

  = He has no house in which he can live.

③ The rumor proved (to be) true.

◎ be to 용법 (형용사적 용법임)

① 예정 : be going to, be due to, be

          scheduled to

  ex. We are to meet at the office.

② 의무 : must, should, have to

  ex. We are to obey the national law.

③ 가능 : can, be able to

  ex. Not a star was to be seen.

④ 운명 : be destined to, be doomed to

  ex. He was never to see his wife.

⑤ 의도 : intend to, want to

  ex. Work hard if you are to succeed.