高二选修7 Unit 3 Under the sea-grammar被动语态课件
I am thinking of getting a new dictionary.I approved of his taking part in the project.I enjoy listening to classical music.V-ing表示的动作与谓语动词的动作同时或在其后发生, 或表示一般情况.being done表示的被动动作正在进行或与谓语动词的动作同时(有时之后)发生, 或表示一般情况.