this is a pen.改为复数句
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this is a pen.改为复数句
this is a pen.改为复数句
this is a pen.改为复数句
These are pens.
There are more pen.
There are pens
These are pens.
this is a pen.改为复数句
This is a pen.(改为复数形式)
This is a pen改为否定句,改为单复数转换改为一般疑问句或提问,肯定句做回答.
What's this?It's a pen.(改为复数句)
is this a red pen 改为复数句,并作肯定回答is that an english book?改为复数句,并作否定回答
This is a book 改为复数句
This is a pear.改为复数句
this is a tree 改为复数句
Is this a bus (改为复数句
this is a shirt改为复数句
this is a watch(改为复数句)
This is a shirt .改为复数句
this is a pencil改为复数句
This is a butterfly改为复数句
this is a letter改为复数句
This is a dog :改为复数句
Is this a pen?(变复数句)
This is a pen变为复数句,怎么变