Is the ball under the table?(作否定问答) This is my nIs the ball under the table?(作否定问答)This is my new computer.(改为一般疑问句)

Is the ball under the table?(作否定问答) This is my n
Is the ball under the table?(作否定问答)
This is my new computer.(改为一般疑问句)

No,it isn't
Is this your new computer?
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