把下列句子改成一般疑问句,并作出否定回答.

正确答案为：
They are ducks.
一般疑问句：Are they ducks?
否定回答：No,they aren't.
Those are tomatoes
一般疑问句：Are those tomotoes?
否定回答：No,they aren't.
These are carrots.
一般疑问句：Are these carrots?
否定回答：No,they aren't
They are cucumbers.
一般疑问句：Are they cucumbers?
否定回答：No,they aren't.
This is a potato.
一般疑问句：Is this a potato?
否定回答：No,it isn't.
This is a sheep.
一般疑问句：Is this a sheep?
否定回答：No,it isn't.
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Are there ducks? No , there are not
Are those tomatoes? No , they are not
Are these carrots? No, they are not
Are they cucumbers? No , they are not
Is this a potato? No, it is not
Is this a sheep? No, it is not

Are they ducks? No, they aren't.
Are those tomatoes?No, they aren't.
Are these carrots?No, they aren't.
Are they cucumbers? No,they aren't.
Is this a potato? No, it isn't.
Is this a sheep?No, it isn't.