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