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