명사절 that vs what (~하는것) 1) that + 완전한 문장 2) what + 불완전한 문장 what caused the defect. 능동태 revise 수동태 be revised others each other 서로서로 be + c ~이다 become + c: ~가 되다 stay + c ~한 상태로 남다 remain + c : ~한 상태로 남다 seem + c : ~처럼 보이다 appear + c : ~처럼 보이다 as 형/부 as :~만큼 ~한 is as skillful as ~만큼 능숙한 is as (capable(o) / capably) as regular employees. be handled as (quickly(o) / quick) as worked as ( effectivel..