either 与 neither少个“n”就是不一样

1、either既可作限定词，也可作代词，指两个中的任何一个，如果指多于两个的任何一个就得用any。 试比较: Has either of you seen him?你们两人有人见过他吗? Has any of you seen him?你们大伙儿有人见过他吗? Either course is open to you.两门课程你可任