v.(使)变长
lengthen的过去分词和过去式

原形：lengthen第三人称单数：lengthens过去式：lengthened过去分词：lengthened现在分词：lengthening

The novel is quite lengthy, stretching over 500 pages.
这部小说相当长，超过了500页。
She decided to lengthen her summer vacation by an extra week.
她决定把暑假延长一周。
The rope was too short, so he needed to lengthen it with a piece of wood.
绳子太短了，所以他需要加一段木头来延长。
His stride lengthened as he approached the finish line.
他步幅加大，接近终点线。
The gardener lengthened the garden path with fresh gravel.
园丁用新石子延长了花园小径。
They lengthened the working hours to meet the project deadline.
他们延长工作时间以满足项目截止日期。
The singer took a deep breath to lengthen her vocal performance.
歌手深呼吸以延长她的演唱表演。
The extension cord allows you to lengthen the reach of your power tools.
延长线可以让你的电动工具的使用范围更远。
She wanted to lengthen her legs by practicing daily yoga.
她希望通过每天做瑜伽来拉长腿部线条。
The government has promised to lengthen the school year to improve education quality.
政府承诺延长学年以提高教育质量。