There's a note pinned to the door saying when the shop will open again

问题描述:

There's a note pinned to the door saying when the shop will open again
这个句子中的 saying 做什么成分?

作伴随状语.!pinned to the door 这句话是做后置定语吗?是的。其实,英语中,there be 句型也有这样的用法:There is a boy sitting in theroom = A boy is sitting in the room.