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