The helping verbs in the sentence above are the following ones: Should and have.
Explanation:
Helping verbs help the main verb in a sentence by extending its meaning. They can also add details to show how time is to be regarded. In other words, they are needed to make up the structure of the sentence. Modal and auxiliary verbs can be used as helping verbs.
In the case of modal verbs, they further modify the action or meaning of the main verb. In this case, the modal used is "should". As regards auxiliary verbs, it can be said that they are used to express tense or to add emphasis. In this case, the auxiliary verb "have" has been used to express tense.
According to the Narrator, the person appears to be a woman, who creeps about the borders. It is one of the characteristics that highlight’s the narrators mental spiral from being trapped in the room.
