给定一个需要修改的句子，让模型根据特定要求对句子进行修改。
原始句子：Fall is my favourite season because the trees changing colors and the temperature cools down.
修改要求：将句子中的拼写错误和标点符号错误进行纠正
Fall is my favorite season because the trees change colors, and the temperature cools down.