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keep doing sth.<-->keep off
keep on doing sth. 继续做某事,表示动作反复,强调动作与动作之间有间隔,常与表示短暂动作的动词连用。 “坚持做某事”,克服困难继续坚持。 (1) 不断地或一直做某事(动作之间略有间隔)。如: He kept on looking at us. 他老是瞧我们。 Don’t keep on asking questions like that. 不要老是问那样的问题。 注:此用法可与 keep doing sth 换用。 (2) 继续做某事(即将一直在做的事继续做下去)。如: He kept on working after dark. 天黑了我们还继续干。 Don’t give up; keep on trying. 别灰心,继续努力。 注:这样的 keep on doing 有时可与 go on doing 换用。如: The boys kept(went)on doing their homework in spite of interruptions. 尽管有干扰,孩子们仍继续做自己的作业。
keep doing sth.<-->keep off
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