A:You told me that John likes to boast about his capability.

你告诉我约翰喜欢自吹自擂。

B: Yes. He always talks about things that are beyond his reach.

是的，他总是谈论他办不到的事情。

A: But when I went to ask him to help me, he kept on poor-mouthing himself.

但是我去叫他帮我，他却很“谦虚”。