三

You are very good at telling stories.

be good at sth./doing sth.表示"擅长于…;精通…"后面可接名词或动词的-ing形式。例如:

Mr. Wu is good at languages, he can speak eight languages.吴先生精通多国语言，他会说8种语言。

另外，be good with sth./sb.表示"善于应付…的;对…有办法"。例如:

The teacher is very good with children.这位老师对孩子很有一套。