The title sounds like the narrator is in the woods while it's snowing.
There is a person walking and he stops by the woods. They are sure they know who owns these woods and that he wouldn't know that he stopped in his woods to watch the snow fall. The horse is thinking that it is strange to just stop when its cold and there is no shelter and it is dark outside. The horse tries to get the riders attention by shaking the bells on it harness. The forest is nice and the rider want to stay but he has promises to keep to people and miles to go before he could sleep.
imagery- woods filling with snow. Auditory- horse bells shaking. Tactile- downy flakes.extended metaphor- miles to go before I sleep. The poet is comparing his trip to a journey of long life. Personification- my little horse must think it's queer. Alliteration- the only other Sound'S the Sweep. The woods are lonely Dark and Deep.
The tone of the poem is a calm, relaxed one. Through the rhythm and Rhyme scheme of the poem flows very smoothing.
The shift takes place in line 13 because this is where the narrator snaps back to reality from the horses feelings and from admiring nature. He snaps back to remembering his duties and promises.
It still seems like the narrator is in the woods it's snowing.