thanks for yr effort,honey.The reason why she was so anxious today is that I didn't say a word the whole time. Sometimes when you explain to her, she doesn't understand either, so the more anxious she is, the less she gets. Moreover, she didn't have a proper attitude to study at the beginning of this semester. I think this is also one of the reasons. Some words she forgot over time.So when she gets anxious, she can't tell the difference between verbs and nouns even more.maybe next class she will be OK.