通过“Mom”（《妈妈》）的小篇章阅读，小朋友可以学会用英语表达“妈妈正在……。”
Mom is +动词ing.
Mom is walking.
妈妈正在走路。
Mom is reading.
妈妈正在看书。
Mom is jumping.
妈妈正在跳绳。
Mom is swimming.
妈妈正在游泳。
Mom is riding.
妈妈正在骑车。
Mom is shopping.
妈妈正在购物。
Mom is eating.
妈妈正在吃饭。
Mom is hugging me.
妈妈正在拥抱我。
