verb to be

affirmative

100

I is hungry.

I am hungry.

200

They is in class

They are in class.

300

She are at home

She is at home.

negative

100

we is not happy.

we are not happy.

200

my father are not here

my father is here.

300

he am not a doctor

he is not a doctor

questions

100

is you sad?

are you sad?

200

is we a student?

are we students?

300

are I a teacher?

am I  a teacher?

short answer

100

yes , He is

yes, I am

200

yes , we is

yes, we are

300

yes, I is

no , I am not