1.It is not cold today

2.I am not  at home now

3.they aren't  UsA

4.there aren't a pen on the desk

5.my name is not Nobita

1.It is cold today
It isn't cold today

2.I am at home now
I amn't at home now

3.they are UsA
They aren't USA

4.there are a pen on the desk
There aren't a pen on the desk
 

5.my name is Nobita
My name isn't Nobita

1.is It  cold today?

2.are you at home now?

3.are they UsA?

4.are there a pen on the desk?

5.what is your name?