Please let me ask one more question about the usage of "has".
ex: She has her back to the door.
According to the textbook, it means
"She is there with her back to the door." Yes, her back is facing the door. ("facing" means 'turned towards')
It's unfamiliar usage for me, is it also a kind of idiomatic usage? No, it has a literal meaning. Could you tell me why "has" can be used in that sentence? In this kind of sentence, "has" describes a situation or condition.
She has a cold.
She has her hat on backwards. (the back of her hat is on her forehead)
He has a bloody face. (= There is blood on his face.)