英语学习中，短句变长句的掌握程度是评估学生英语能力的重要指标之一。高考中常考察此项能力，例如将"She is beautiful"扩展为"She is a beautiful girl who has a charming smile and sparkling eyes"。这不仅考察了学生对短句变长句的掌握程度，也要求学生提升句子复杂度，更好地展示英语水平。
例题1
短句：She is beautiful.
长句：She is a beautiful girl who has a charming smile and sparkling eyes.
例题2
短句：I like to play basketball.
长句：Playing basketball is my favorite hobby and I always enjoy the feeling of shooting a perfect basket.
例题3
短句：He is my best friend.
长句：I have known him for many years and he has always been there for me, so he is not only my best friend but also my most trusted companion.
例题4
短句：I went to the store.
长句：After finishing my homework, I decided to take a walk and went to the store to buy some snacks.
