“却”是表示转折关系的关联副词,用在转折复句的后一个分句里。它有时跟“但是、可是”之类并用,有时单用.例如:①虽然离出发的时间还有半小时,但是同学们都到齐了。②虽然离出发的时间还有半小时,同学们却都到齐了。③虽然离出发的时间还有半小时,但是同学们却都到齐了。例①单用“但是”,例②单用“却”,例③并用“但是”和“却”。 “But” is a related adverb that indicates a transitional relationship and is used in the latter clause of a transition complex sentence. It is sometimes combined with “but, but” and sometimes it is used alone. For example: 1 Although the time to leave is still half an hour, the students are all together. 2 Although there was still half an hour away from the departure time, the students were all together. 3 Although there was still half an hour away from departure, all the students were all together. Example 1 uses only “but”, example 2 uses only “but”, and example 3 uses “but” and “but.”