1. The primary metaphor at work in the poem is that the two roads represent the choices and decisions we make in life. The fork in the road is a symbol for the turning points in our lives where we must choose between two different paths or options.
2. The primary metaphor in the poem cannot be rewritten as a simile since it is already a metaphor. A simile is a comparison of two unlike things using "like" or "as," whereas a metaphor is a direct comparison of two unlike things.
3. The line "Two roads diverged in a yellow wood" can be interpreted metaphorically as a representation of the many different choices and paths that are available to us in life. The "yellow wood" can be seen as a symbol of autumn or the passing of time, suggesting that the speaker is at a crossroads in their life and must make a decision about which path to take. The "diverged roads" represent the different choices or options that are available to the speaker, each leading to a different destination. The line "And sorry I could not travel both" further emphasizes the difficulty of the decision-making process, suggesting that the speaker wishes they could choose both paths, but must ultimately choose only one.