一个嵌套的定语从句例子

不列完整的句子了，只列被修饰词和定语从句
例句来源于 《The adventures of pinocchio》<木偶奇遇记>英文版第二章
on account of the wig he always wore which was just the color of yellow corn.
he always wore 是第一个定语从句 the wig是该定语从句的逻辑宾语。
which was just the color of yellow corn 这是第二个定语从句，the wig用关系代词which指代，是定语从句的逻辑主语。
所以我们看到了，这个从句的先行词在从句里面分别做逻辑宾语和逻辑主语
我们可以把the wig he always wore当作一个整体，后面的 which was just。。。修饰这个整体，这就是一个嵌套


还有另外一个例子稍有不同：
She has an adopted child who she says was an orphan.
她有一个她说曾是孤儿的养子。
这里 前面有who关系代词，后面was前面就省掉了who. 这里的关键是who was an orphan，she says是补充说明，我个人认为理解成插入语更好懂。
前面还说了一个不定式嵌套的例子： What to tell him to do. 这里不同的是这个是名词性从句，关键是What to do,我也理解成 to tell him是插入语，比当作不定式嵌套更好懂。