mistake是可数名词。mistake，作名词时意为“错误；误会；过失”；作动词时意为“弄错；误解”。
mistake是可数名词
1.I found a mistake in that sentence.
我发现那个句子有一个错误。
2.You've made several grammatical mistakes in the composition.
你的作文中犯了几处语法错误。
3.They made the big mistake of thinking they could seize its border with a relatively small force.
他们大错特错，居然认为以较少的兵力就能够夺取其边境地区。
mistake基本含义
n.(言语或行为上的) 错误，失误;(用词或数字等上的) 错误，口误，笔误;
v.误会;误解;看错;
第三人称单数：mistakes
复数：mistakes
现在分词：mistaking
过去式：mistook
过去分词：mistaken
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