They are (talking about Ben's birthday).否定句、一般疑问句、提问

问题描述:

They are (talking about Ben's birthday).否定句、一般疑问句、提问

否定句:
They are not talking about Ben's birthday.
他们不是在谈论Ben的生日.
一般疑问句:
Are they talking about Ben's birthday?
他们在讨论Ben的生日吗?
提问句:
What are they talking about?
他们在谈论什么呢?