is that a box改成复数

is that a box改成复数 把This is a box and that is a knife.改成复数形式 That is a box 改为复数句子 That is a desk .(改成复数) That is a box 改为单数或则复数 改成复数形式．1．Is that a bus?2.What's thia?It's a box.3.Where is the pen?It's in the desk. this dictionary is in that box复数 That box is his复数句式 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's a dark red box复数 That's a box变成复数形式 The lunch box is his.(改成复数句） This is a box.改为复数形式 this is a box改为复数 英语句子单数变复数1、Is that her English book?(改成复数)2、Those aren't Chinese buses.(改成单数)3、It isn't his pencil-box?(改成复数) that is a box用英语改成疑问句,并用肯定句做回答 将下列句子改成复数句,或反之,一格一词1:Is that your box?( )( )( )( ) 2:She has a new biouse.( )( )( )( ) 3:We have English books.( )( )( )( )( ) 4：This is an eraser.( )( )( )