This is a pretty dress改为复数形式

将下列句子改为复数形式 (1)this is a pretty dress.(2)lt's a This dress is pretty.(改为复数句) This dress is pretty 改为一般疑问句 This is a pink dress改为复数句子 改为复数形式 1.is there a bok on the desk?2.this is a nice dress. This is a box.改为复数形式 This is a pen.(改为复数形式) this is a book改为复数形式 This is a cat.(改为复数形式) that is my dress.改为复数形式 is this your dress?改为复数句 that girl is very pretty.改为复数形式