informing me 为什么这样用？谢谢！

来源：百度知道 编辑：UC知道 时间：2024/06/07 22:52:10
I have received a letter from my old school ,informing me that my former headmaster.
informing me是现在分词作语，跟主句同主语（主语是发出者）才可这样用的。
他被通知，为什么用现在分词？
请问怎样跟学生解释？谢谢！

一个句子只能用一个动词，除非有连词连接。出现了第二第三个或以上的动词就要改用非谓语。非谓语有三种：-ing,-ed,to do.主动用-ing，被动用-ed，要做还没有做的用to do。此句inform前无连词，且是主动的，所以用informing。

I have received a letter from my old school ,informing me that my former headmaster.
＝I have received a letter from my old school ,which informs me that my former headmaster.

后面的定语从句修饰前面主句的宾语a letter

它逻辑上的主语是the letter 信通知我…