Polly Lingual
To Be (Negation)
开始上课
刽子手
词汇
Vocabulary
aren't
isn't
短语
Phrases
It isn't bad.
Related Lessons
你好吗？
How Are You?
星期几
Days of the Week
~ies Verbs
To Have
常见标记
Common Signs
课程
Courses
初级
Beginner
语法
Grammar
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