Contractions - Be - Present Tense

I am / I’m / I’m not

(Q) What are you doing?
(A) I’m playing tennis.
(N) I’m not doing anything.
(N) I ain’t doing anything. (slang)

You are / You’re / You’re not / You aren’t

(Q) Where am I going?
(A) You’re going home.
(N) You’re not going to work.
(N) You aren’t going to work.

He is / He’s / He’s not / He isn’t

(Q) What is he doing?
(A) He’s working.
(N) He’s not working.
(N) He isn’t working.

She is / She’s / She isn’t / She’s not

(Q) When is she leaving?
(A) She’s leaving tomorrow.
(N) She’s not leaving until tomorrow.
(N) She isn’t leaving today.

It is / It’s / It’s not / It isn’t

(Q) Is it working?
(A) It’s working.
(N) It’s not working.
(N) It isn’t working.

They are / They’re / They’re not / They aren’t

(Q) What are they doing?
(A) They’re talking.
(N) They aren’t talking.
(N) They’re not talking.

We are / We’re / We’re not / We aren’t

(Q) What are we buying?
(A) We’re buying a car.
(N) We aren’t buying a car.
(N) We’re not buying a car.