The reason why be didn't come was __ he was ill空格里为什么填THAT?而不是WHAT?如果THAT做着个WAS后面的表语从句的时候,他后面的he was ill不完整啊?
问题描述：
The reason why be didn't come was __ he was ill
空格里为什么填THAT?而不是WHAT?
如果THAT做着个WAS后面的表语从句的时候,他后面的he was ill不完整啊?
答
首先可以判断这是个表语从句The reason was___he was ill。
也可以这样理解He was ill，本身是个完整的句子了，不确认任何成分了
答
that
答
he was ill是完整的，what做宾语或主语，但是本句不缺。that作表语即可
答
that 后面+句子啊 he was ill 是个句子
答
that在这里是引导同位语从句
答
he was ill是完整的句子 所以用连词that
答
the reason why.is that
典型的表语从句的结构,“.的原因是.”（高一会讲）
空格后面已经完整
he主 was 系 ill表
所以空格处不做任何成分,而what引导的不论什么从句都是要做成分的,所以这能是that
总的来说就是 that引导（he was ill）做was（第一个was）的表语,在 表语从句中不做任何成分
答
填that
he was ill 已经完整了 不缺宾语