I'm sure they will be very happy.句子结构 .为什么要用THEY

I'm sure they will be very happy.句子结构 .为什么要用THEY
I'm sure they will be very happy.句子结构 .为什么要用THEY

I'm sure they will be very happy.句子结构 .为什么要用THEY
因为这话的意思是我确定他们会很高兴.指的主体是‘他们’ .所以用they啊