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