What I say单独的使用方法

What I say, said Trevor. the old man you saw today in the studio was Baron Hausberg. He is a great friend of mine, buys all my pictures and that sort of thing, and gave me a commission a month ago to paint him as a beggar.

What I say（名词性句子，意思是我所说的事物）可以像如此单独做一个成分吗？和后面的句子有联系吗？

在口语中，what I say 的意思是“在我看来；我的怎么看是”。可以当作插入语处置，等于“in my opinion；in my point of view”。

假如剖析结构的话，则是一个名词性从句。意思是“我所说的话，我的意思是”等。