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表示时间的前后用 before， after (1) before：在…之前 Wash your hands before dinner.(before作介词)吃饭前请洗手。 He will call me before he leaves here.(before作连词)他离开这儿之前，他将给我打电话。 (2)after：在……之后 注意：before和after这两个词都是既可作介词，又可作连词。 Let's Sing some songs after school.(after作介饲)放学后咱们唱歌吧! Pleas close the door after you leave the room.(after作连词)离开房间后请关门。 (责任编辑：admin) |