I have just recieved a letter,informing me that she is sent to America

题目

I have just recieved a letter,informing me that she is sent to America
请高手解释此句的结构,是什么从句
我个人认为是和非谓语动词和状语从句有关吧，可是又有些糊涂，请高手指教了

答案

I have just recieved a letter是主句,
informing me that she is sent to America 是非谓语,但不是从句,现在分词做伴随状语,修饰主句,表示收到信件的同时,通知了我她被送去美国了.
that she is sent to America 是非谓语里面的宾语从句,表示通知我们的内容是什么