您说的问题应当这样表达:man 和后面的名词要取得数的一致。
如下:
男老师,单数是“man teacher”,复数是“men teachers”;
女老师,单数是“woman teacher”,复数是“women teachers”。
错了,男老师是 man teacher, 复数 men teachers
女老师,单数是woman teacher,复数是women teachers。
男老师,单数是man teachers,复数是men teachers;
女老师,单数是woman teachers,复数是women teachers。
Why don't you use male teachers and female teachers?
men teachers