these are your keys 改为单数句
these are your keys 改为单数句
Are these your cousins改为单数形式
are these your books?改为单数形式
These are your books.(改为单数)
怎么把Are those your keys改为单数形式?
is that your photo改为复数句 are these her borthers 改为单数句
is this your ruler? 改为复数句 Are these her erasers?改为单数句
Are these nice pictures 改为单数句
These are his brothers 改为单数句
These are yellow purses.(改为单数句)
These are dishes 改为单数句
These are my pencils改为单数句