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该词没有过去分词,例如:
1、There have been some problems but basically it's a good system.虽然出现过一些问题,但这基本上仍不失为一个好系统。
2、There are some obvious practical applications of the research.这项研究有一些明显的实际用途。
3、I had some idea of what the job would be like.我对于这份工作有了一些了解。
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