The dictionary is mine.变成复数句?The dictionaries are mine.有时都变复数，有时只是一部分变复数，到底什么时候该变什么时候不变？

The dictionary is w_____ 79 yuan. Is ( )dictionary yours?A a B the The dictionary is nice改为复数 red dictionary is the in a library The dictionary is e__ useful for beginners. Lucy's dictionary is on the sofa对Lucy's dictionary is on the sofa.提问 The English dictionary is on the bookcase对The English dictionary 提问 The dictionary is yours.I put the dictionary on the desk just now 改为定语从句 The dictionary is Alice's.对Alice's进行提问( ) ( )the dictionary? there is a dictionary on the on the chair 对a dictionary 提问 The dictionary is in the bookcase.改为一般疑问句. Is the dictionary on the desk?改为复数句 dictionary,the,is,table,the,under怎么组合 What is the priles of the dictionary写出同义句 Is your dictionary in the d___ of the desk? The ( ) letter is ''r'' in the word ''dictionary'' Do you know whose dictionary it is?(改同意句) Do you know----the dictionary----------- -------? The writing of a dictionary is a big job用加a of a dictionary