核心问题
（1）I'll catch you up later. （2）I'll catch up with you later.
上面两个句子的意思是否相同？
词典解答
上面两个句子的意思是相同的,只是句(2)多用于英国英语:
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Go on in front. I'll soon catch you up/catch up (with you). 你先走吧,我很快就会赶上你。
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I had to run to catch her up. I had to run to catch up with her. 为了追上她,我非得跑不可。
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We shall have to work hard to catch the other firm up. 我们必须努力干,才能赶上另一家公司。