They are sure that she will win.为什么有that
问题描述：
They are sure that she will win.为什么有that
答
宾语从句的引导词,可以省略.解释一下，没听懂这是个宾语从句，主句是they are sure，从句是she will win。主句和从句之间可以用that连接，而that也可以省略不要。意思是他们确信她会赢。