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