根据英语语法规则，"turn on the light" 是正确的表达，表示"打开灯"。结合礼貌用语"Please"，完整句子应为：

Please turn on the light.

其他相关练习：

连词成句

- on, turn, light, the → Please turn on the light.

- the, light, turn, on → Turn on the light, please.

选择正确形式

- Let's _____ the TV.

A. turn on

B. to turn on

*正确答案：A. turn on *

若需进一步学习，建议结合教材配套练习或语法解析视频巩固。