How does Robert Frost use Motifs, Symbolism and Metaphors in his poetry?

I have been reading some Robert Frost Poetry recently and have noticed in the few I have read that he frequently uses Motifs, Symbolism and Metaphors in his poetry. I was just wondering how this carries across all of his poetry and what some examples of Motifs, Symbols and Metaphores are he frequently uses?

You are the one who recognizes motifs, symbolism and metaphores. Then you ask the question as to samples. Pleaaaase!! LOL