The sentence you wrote is almost correct! Let's look at it step by step:
- Original sentence: On hot days, I rest on a branch and let my legs hang off.
- The phrase "hang off" is a little incomplete here. We usually say "hang off the branch" to show where the legs are hanging from.
- So, a better sentence would be: "On hot days, I rest on a branch and let my legs hang off the branch."
Alternatively, to avoid repeating the word "branch", you can say: "On hot days, I rest on a branch and let my legs hang down."
Both options are clear and grammatically correct!