they were talking loudly when the teacher came in”when the teacher came in “划线对划线部分提问_________ _______ they talking loudly?
问题描述:
they were talking loudly when the teacher came in
”when the teacher came in “划线
对划线部分提问
_________ _______ they talking loudly?
答
when did
答
When were
问时间用when,主语是they,复数,时态是过去时,系动词要用were