单复数句型This is a knifeThat is a tomatoThat child is very goodThese are miceThose are children句型转换

This is a knife 改为复数 This is a knife.怎样变复数. 单复数句型转换It is a bag.Is that an eraser?What's this in English?He isn't my friend.Are these their photos?He has a round face.Do the boys have apples?She has a knife. This is an apple,that's a knife句型转换 单复数句型This is a knifeThat is a tomatoThat child is very goodThese are miceThose are children句型转换 Whose knife is this?(改成复数) Is this your knife 改为复数句子 this is my knife改复数句 Is this her knife变复数 把This is a box and that is a knife.改成复数形式 This is a box and that is a knife （改为复数句） This is a pen and that is a knife改为复数形式 this is knife in the box（变复数句 whose knife is this?将句子变成复数 This knife is his.怎么改复数形式的句子? This is a knife.（改为复数句） Is there a glass on theThis is a knife.（改为复数句）Is there a glass on the desk?(改为复数句)Ther are apples.（改为单数句） This is a box and that is a knife.改为复数形式〔怎么变的〕 has的单复数与主语相同,还是与宾语的个数相同?This child has an apple and a knife.还是This child have an apple and a knife.