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1、be busy (in) doing sth 忙于做某事 be late (in) doing sth 做某事做晚了或做迟了 spend money time (in) doing sth 花钱(时间)做某事 waste money time (in) doing sth 浪费钱(时间)做某事 have luck (in) doing sth 做某事时有运气(走运) have difficulty (in) doing sth 做某事有困难 have trouble (in) doing sth做某事有困难 have bother (in) doing sth 做某事费劲 have a pro
2、blem (in) doing sth做某事有困难 have a good time (in) doing sth 做某事很开心 have a hard time (in) doing sth 做某事很辛劳 find difficulty (in) doing sth 做某事发现有困难 There is no difficulty (in) doing sth 做某事没有困难 There is no use (in) doing sth 做某事没有用 There is no point (in) doing sth 做某事没有意义Be careful (in) crossing the street. 过街道要小心。但若介词 in 出现在句首，则通常不宜省略： In crossing the street he was run over. 他在穿过马路时被汽车撞倒。