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许多词既可作介词又可作副词: He got off the bus at the corner.(介词) 他在拐角处下了公共汽车。 He get off at the corner.(副词) 他在拐角处下车。 这些既可作介词又可作副词的词中最重要的有above,about, across,along,before,behind,below,besides,by,down,in,near,off,on,over,past,round,since,through,under,up: They were here before six.(介词) 他们6点之前在这里。 He has done this sort1 of work before.(副词) 他以前干过这种工作。 Peter is behind us.(介词) 彼得在我们的后面。 He′s a long way behind.(副词) 他远远地落在后面。 She climbed over the wall.(介词) 她爬过墙头。 You′ll have to climb over too.(副词) 你也得爬过去。 When the meeting was over the delegates2 went home.(副词) 会议结束后代表们各自回家了。(这里over=finished结束) The shop is just round the corner.(介词) 商店拐过街口就是。 Come round(to my house)any evening.(副词) 晚上有空来我家串门。 He ran up the stairs.(介词) 他跑上楼梯。 He went up in the lift.(副词) 他乘电梯上去了。 这些词中许多可以用来构成短语动词(参见第三十八章): The plane took off. 飞机起飞了。(离开了地面) He came round. 他恢复知觉了。(恢复了意识) 点击收听单词发音
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