spend的主語必須是人,常用于以下結構：
(1) spend time ／money on sth.在……上花費時間（金錢）.例：I spent two hours on this maths problem.這道數(shù)學題花了我兩個小時.
(2) spend time ／money (in) doing sth.花費時間（金錢）做某事.例：They spent two years (in) building this bridge.造這座橋花了他們兩年時間.
(3)spend money for sth.花錢買…….例：His money was spent for books.他的錢用來買書了.
不明白的再問喲,請及時采納,多謝!