请问这句话的informing me that my former headmaster怎么理解做什么成分
问题描述：
请问这句话的informing me that my former headmaster怎么理解做什么成分
I have just received a letter from my old school,informing me that my former headmaster ,Mr Stuart Page ,will be retiring next week.
答
我刚刚收到一封来自我以前学校的信,告知我以前的校长－－斯图尔特.佩奇先生,将于下周退休.
informing me that my former headmaster是现在分词结构做letter的定语,解释letter的用途.