Washington (to be) in America.
is
Your classmates (to be) friendly? Short answer (yes)
Are your classmates friendly? Yes, they are.
He (to be) married? short answer (no)
Is he married? No, he isn't.
This exercise (not to be) difficult.
is not/isn't
An elephant (to be) a big animal.
is
Mr and Mrs Jones (to be) teachers.
are
Lemons (to be) sweet? short answer (no)
Are lemons sweet? No, they are not. / No, they aren't.
Mice (not to be) big animals.
are not/aren't
Hockey (not to be) a slow game. It (to be) fast.
is not/isn't....is
It (to be) cold today.
is
I (not to be) a teacher. I (to be) a student.
am not/ 'm not....am
They (not to be) thirsty, they (to be) hungry.
are not/aren't....are
Dogs (to be) man's best friend.
are
Amy (to be) 5 years old?
Is Amy 5 years old?
Europe and Africa (to be) continents.
are
She (to be) very tired.
is
You (to be) interested in football? short answer (yes)
Are you interested in football? Yes, I am.