That is a box 改为单数或则复数

That is a box 改为单数或则复数 This is a bus 改为单数或则复数 That is a box 改为复数句子 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 That is a pencil box（改为否定） 改成复数句.What is it?It's a box.改成单数句.The children are YOUNG Pioneers.改成复数句,并作肯定回答.Is this a red pen?改成复数句,并作否定回答Is that an English book?改为单数句Those are apples改为单数句Those a This is a box and that is a knife （改为复数句） That is a red pencil box.()That is a red pencil box.(改为否定句)____________________________.Is this your baseball?(作否定回答)___________________________. These are english books 改为单数或则复数 This is a box.改为复数形式 this is a box改为复数 This book is in that box.（改为复数形式） That is my pencil box改为一般疑问句 That red box is Jane's.(改为否定句) That box is very heavy(用light改为选择疑问句) This is a box and that is a knife.改为复数形式〔怎么变的〕 is that a box改成复数 this box is a little than that