Question

the children are什么their homework at the moment

Are the children doing their homework at the moment?的肯定回答 at the moment是什么时态的标志?
Are the children doing their homework at the moment?的肯定回答是什么?
at the moment是什么时态的标志?

Answer 1

肯定回答：Yes,they are.
否定回答：No,they aren't.
at the moment意思是：此刻；当时.是现在进行时的标志.