This is a box and that is a knife.改为复数形式〔怎么变的〕

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This is a box and that is a knife.改为复数形式〔怎么变的〕
This is a box and that is a knife.改为复数形式〔怎么变的〕

This is a box and that is a knife.改为复数形式〔怎么变的〕
These are boxes and those are knives.
指示代词this that都是单数,应改为复数,this（这）的复数为these（这些）,that (那)的复数为those(那些),
谓语动词is是单数,应该改为复数are,
名词也应该相应地改为复数,所以a就不可以再出现了哦,
名词变复数一般在名词后面加“s”,但遇到以x,sh,ch等结尾的要加“es”,遇到以f,fe结尾的要改f或fe为v再加es哦,
所以box的复数是boxes,knife的复数形式是knives,
如果还有疑问欢迎再提出来哦~~

These are boxes and those are knives。
This—These
is——are
a box—boxes
that——those
a knife——knives
唔，这些都是固定的改法，记住就行了~

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 pencil box.对a pencil box 提问 This is a pencil box.(对” a pencil box”提问 ) this box is big .And that one is a little ( )(big). This is a box.改为复数形式 this is a box改为复数 this box is a little than that This is a box and that is a knife.改为复数形式〔怎么变的〕 this box is big This box is big. And that one is a little(big). 按单词的正确形式填空 Is this your pencil box ____ the lost and found box ? What is this? It is a box.复数形式 This is a pencil box 改为一般疑问句 this is a pencil-box这个句子有什么错 this is a box.变复数句___________? this is an empty box=this box is not What's this?It's a box.为什么回答中要用It's,而不用this is a box