【正文】
nt. Now , He is a teacher. Five years ago . Maomao was a pupil . He studied very hard . study 學(xué)習(xí) studied 學(xué)習(xí)的過去式 Twenty years ago , my grandpa was a teacher. Now he is old , he is retired . fire 爐火 fireman 消防員 tired 勞累的 retired 退休的 practice Ten years ago,…was... Now,…am/is…