none of Mary,Betty or Tom are students 还是none of Mary,Betty and Tom are students怎么用
问题描述：
none of Mary,Betty or Tom are students 还是none of Mary,Betty and Tom are students
怎么用
答
none of Mary, Betty nor Tom is student.
答
应该是第一种。表示在这些人中一个也不是学生或者是表示这些人都不是学生。
答
否定句中表全部否定，连词应用or.
答
or一般用于疑问句中，而这是陈述句。
答
none of Mary,Betty and Tom are students