The hope是主语 she expressed修饰the hope
is是系动词,有系动词时句子的格式就叫“主系表”
所以that后面这段就叫表语
所以 这个句子就叫表语从句.
如果还用不懂的私信问我~I have no idea what her name is 是什么从句啊通常情况我们可以把I have no idea 看成I don't know所以what her name is 可以看成宾语从句不过严格地从语法上来讲what her name is是no idea的同位语从句