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英语
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到底是have a problem in doing sth
还是have problem in doing sth
为什么problem不加s
人气：338 ℃ 时间：2019-11-11 23:03:25
解答
固定搭配,在做某事上有困难
problem是可数名词.当前面有定冠词a时,其用原型；当其前没有定冠词时,才加s.
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