Those men aren't doctors.
I am not taking the book off the table.
The students aren't in that room.
We aren't looking at (me??) you.
My friend isn't a student.
These books aren't good.
My tie isn't red.
My pen isn't thin.
Kate isn't a teacher.
Are those men doctors?
Am I (Are you) taking the book off the table?
Are the students in that room?
Are we looking at you?
Is my friend a student?
Are these books good?
Is my tie red?
Is my pen thin?
Is Kate a teacher?