由于补助动词“■”和“■”语义的特殊性和复杂性,导致学生很难掌握其含义及应用。因为这两个词不仅含义难理解,二者的辨析也是一个难题。基于此,从补助动词“■”和“■”的体意义和情态意义两方面出发对其含义进行研究,然后对“■”和“■”的意义差异进行对比,以期更准确地理解和掌握二者的含义,理解二者的差异,在学习和运用中避免出现错误。 Due to the particularity and complexity of the semantics of auxiliary verbs “■ ” and “”, it is hard for students to grasp their meaning and application. Because these two words not only difficult to understand the meaning of interpretation, the two is also a problem analysis. Based on this, the meanings of modal verbs “■ ” and “■ ” are studied in terms of their meaning and modality meaning, and then the differences of meaning between “■ ” and " , In order to more accurately understand and grasp the meaning of the two, to understand the differences between the two, in learning and use to avoid errors.