i am an english teacher

(-): I am an English teacher.

(?): Are you an English teacher?

Yes, I am an English teacher./No, I am not an English teacher.

my friends are very tall

(-): My friends are very tall.

(?): Are your friends very tall?

Yes, my friends are very tall./No, my friends are not very tall.

the coffee is sweet

(-): The coffee is sweet.

(?): Is the coffee sweet?

Yes, the coffee is sweet./No, the coffee is not sweet.

today is a hot day

(-): Today is a hot day.

(?): Is today a hot day?

Yes, today is a hot day./No, today is not a hot day.

the children are in the garden

(-): The children are in the garden.

(?): Are the children in the garden?

Yes, the children are in the garden./No, the children are not in the garden.