关系分析如果包括名词性关系分析的话,显然是可以的。
在句子里面做主语宾语等:
That is not what I want. ( What I want名词性关系分句)
也可以做状语,
What's more remarkable, he managed to inspire confidence in the most suspicious people.
(按照夸克的分析,这个句首的wh分句是名词性关系分句,当然有人可能会争辩说这个是疑问分句)
另外,句子关系分句也可以做状语,这也是句子(分句)的直接构成成分:
They are going to buy the house, which is surprising in view of its price.