They ____ going to see my mother this Sunday.这里为They ____ going to see my mother this Sunday.这里为什么填are both,而不是both?
问题描述：
They ____ going to see my mother this Sunday.这里为
They ____ going to see my mother this Sunday.
这里为什么填are both,而不是both?
答
主谓宾诶，填both怎么有谓语
答
句型be going to do