1. Now I got it.
现在我明白了。
2. I didn’t get it.
我没明白你的意思。
3. Excuse me, Mr. XX, I'm confused about this question.
打扰一下，XX先生，我对这个问题不太明白。
(也可以这样说：Excuse me, Mr. XX,I don’t understand this question.)
4. Can you please explain it again?
你可以再讲一遍吗?
(也可以这样说：Can you repeat it.please?)
5. I am sorry, I don’t know the answer.
对不起，我不知道答案。
6. Excuse me, I can’t hear you.
对不起，我不知道答案。
7. Excuse me, Mr. XX, may I ask you a question?
打扰了，我听不到你说话。
8. I want to answer this question.
我想回答这个问题。
9. Can you tell me the answer to this question, Miss Gao?
高老师，你能告诉我这个问题的答案吗?
10. I am afraid I can't answer the question.
我恐怕回答不了这个问题。
11. Thank you for your understanding and trusting, teacher.
老师，谢谢您的理解和信任。
12. I like your class.
我喜欢上你的课。
13. We really enjoy your class.
我们真的喜欢听你的课。
14. You're a terrific teacher.
你教的很棒。
15. I am sorry. I didn’t finish my homework.
对不起，我未能完成家庭作业。
16. Thank you for keeping me on my toes.
谢谢你让我能专心上课。
