为什么把teachers' day的teachers'写成那样,而不写teachers's快要讲清楚,我才13岁

为什么把teachers' day的teachers'写成那样,而不写teachers's快要讲清楚,我才13岁 TEACHERS’DAY的汉语 teachers'Day 的中文意思 关于Teachers' day的作文 Happy Teachers' Day 的作文 为什么Mother's day 的mother 是单数而Teachers'day 的teacher 是复数? 为什么教师节是Teachers‘ Day 而父亲节不是Fathers’ Day teachers' day is coming的英语翻译 教师节的英文是Teacher's day or Teachers' day 英文的教师节怎么写是The Teacher's Day The Teachers' Day Teacher's Day 还是Teachers'Day Eastr Day Thanksgiving Day Halloween AprilFools”Day Teachers”Day这些节日的日期是多少? Happy Teachers'Day是什么意思 Happy Teachers‘Day!中文 Happy Teachers'Day! 手抄报teachers day teachers day 作文 teachers'Day card. Teachers' Day为什么Deachers' 和Day都大写,还有为什么teacher'后面还加一个' 呢