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?

问题描述:

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?

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.