大师作文网It is pen .（变成一般疑问句）Are you Maria?（否定回答） It is pen .（变成一般疑问句
It is pen .（变成一般疑问句）Are you Maria?（否定回答） It is pen .（变成一般疑问句
it is a pen(改为一般疑问句)
It is his pen(改为一般疑问句)
It is a pen改一般的疑问句并回答
You are Maria变成否定句,This is Mr Chen.改一般疑问句
It is a red pen.变一般疑问句,并做否定回答
Tom is in China.（变成一般疑问句,并作肯定回答.）Mary's pen is yellow.（变否定句）
the pen is blue怎样变成一般疑问句?
It is a pen.改为否定句,并作肯定回答.改为一般疑问句,并作否定回答
that is his pen变一般疑问句并否定回答
It is a fish.(变成一般疑问句）
It is a cow(变成一般疑问句)