将以下句子改为复数形式1.This is a black and grey shirt.

将以下句子改为复数形式1.This is a black and grey shirt. 将以下句子改为复数形式,谢谢 1.this is my case. 2.my dress is green. 3.that's my suit.4.Is this your passport? 5.Is your friend Russian? 6.here it is. This is a bus.改为复数形式的句子 Is this your dictionary?改为复数句子形式急用!11 This is my dictionary(改为复数形式的句子） 将下列句子改为单数或复数形式1.This is a T-shirt in the box.[改为复数]2.These are knives.[改为单数]3.It is an apple.[改为复数]4.They are students in the school.[改为单数]5.That is a welf.[改为复数]6.Is there a book in This is my sister.改为复数形式、 This is my friend 改为复数形式 this is a book改为复数形式 Is this your friend?改为复数形式 This is a dress.改为复数形式 This is my cousin.改为复数形式. This is his cousin.改为复数形式 This is a cat.(改为复数形式) This is her baby.改为复数形式 This is a box.改为复数形式 This is an arm.改为复数形式 This is a pen.(改为复数形式)