短语be interested in 为什么是be interested in而不是interested in

短语be interested in 为什么是be interested in而不是interested in be interested in 和be interested with.. be interested in be very interested in be interested in 的替换短语是什么 be interested in 这短语的理解. 为什么be interested in,be excited at be interested in doing和be interested in sb/sth be interested in为什么加doing be interested in doing sth be interested in的用法 be interested in的意思