He is fine
否定句:He isn't fine
一般疑问句:Is he fine?
肯定回答:Yes,he is
This is a book
否定句:This isn't a book
一般疑问句:Is this a book?
肯定回答:Yes,this is
My name is Tony
否定句:My name isn't Tony
一般疑问句:Is your name Tony
肯定回答:Yes,it is
His phone number is 235-6125
否定句:His phone number isn't 235-6125
一般疑问句:Is his phone number 235-6125
肯定回答:Yes it is