在高等教育出版社出版的中职教材《英语基础模块·练习册2》的第80页有这样一句：

Teachers and parents all think the book is a very good idea. It will teach students how to be a good person in the online world. It will be a guide for teens using the Internet and keep students away from bad sites.

请大家讨论一下，这里的 It will be a guide for teens using 对得对吗？我是说这里的 using 不应该是 to use 吗？感觉应该是It will be a guide for sb to do sth 这样的用法吧！况且这个 to use the Internet 还与后面的 keep students away from bad sites 是并列结构吧。后面的keep students away from bad sites 可视为是承前省略了不定式符号 to 的不定式。