Mary is/am/are sad.
Mary is sad.
They is/are/am ______.
They are students.
My friends am/is/are happy.
My friends are happy.
What are they?
They are school bags.
What is it?
It is a rubber.
____ they pencil sharpeners?
Are they pencil sharpeners? - No they aren't. They are pencil cases.
They are/is/am textbooks.
They are textbooks.
Is it a compass?
Yes, it is.
Who is he?
He is a teacher.
What is it?
It is a caculator.