动词-ing形式作表语、定语和宾语补足语 一、动词-ing形式作表语 1.表示主语的内容,可以转换到句首作主语。 Her job is keeping the lecture hall as clean as possible. =Keeping the lecture hall as clean as possible is her job. 她的工作是尽量使报告厅保持干净。 Her duty is taking care of the babies. =Taking care of the babies is her duty. 照看婴儿是她的职责。