There are two dialogues, in which B in (1)is a foreigner, and B in (2) is a Chinsese. B’s utterance in (1)is different from one in (2),which shows modesty, Chinese moral quality. therefore, which knowledge of context is involved in these two examples? (1)A: You speak beautiful English. B: Thank you. I had very good teachers in the university. (2)A: You speak beautiful English. B: No, no. My English is very poor.