teacher's desk and teachers' office 为何单、复数不同

teacher's desk and teachers' office 为何单、复数不同 teacher's desk还是teachers' desk 讲台的英语是teachers' desk还是 teacher's desk simon walked ( ) his desk( ) the teacher's desk 填介词 this a teacher,s deacher desk? The teacher's desk is y_____, Jim is ( ) the teacher's desk? This is s（） a.teachers'desk b.teacher desk c.tThis is s（） a.teachers'desk b.teacher desk c.teacher's desk teacher's desk or teachers' desk?teacher's office or teachers' office? 是where is teacher 'desk 还是where is the s teacher 's desk 为什么? on teacher's desk和on the teacher's desk有什么不同 My homework is on the 什么desk and yours is in the什么office.A teacher's；teachers'B teachers' ;teacher's C teacher's ;teacher's D teachers' ;teachers'大家帮帮忙 1.seat,where,your,is 2nice,clean,and,classroom,is,it 3.the,yellow,teacher’s,desk,is1.seat,where,your,is 2nice,clean,and,classroom,is,it 3.the,yellow,teacher’s,desk,is 连词成句are,books,in,bookcase,his,the,cards,and .on,desk,teacher's,the,tape,is,player,the? There is a bag and two books on the teacher's desk?这句话对吗?如果is改为are对吗? 怎样回答What's on the teacher's desk? there's a video t_____on the teacher's desk. There's a desk and o___ the desk.首字母填空