I am a teacher.(名词作表语,表身份,特征……等。)
My daughter, you are the gift Heaven gives me.(gift是名词,这个是作比喻的吗?)
you are a tree.you are a book.这个可以吗,为什么不行?可以作它比喻句吗?
I have a good idea.与 a good idea come to my head物做主语是可以的,但有时就不能了,the house was built.为什么可以这样?有些词可以拟人的修饰手法,有些这样用就不能了?