词的变格不完全变化的变形不全的如英语里的must只有现在时形式不完全变化词如oughtmust为不完全变化助动词
Incomplete declension of words, incomplete transformation of inflection, such as "must" in English, which only has incomplete changes in the present tense. Words like "enough" and "must" are incomplete changes of auxiliary verbs
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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