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To be

I am  -> I'm            I am not --> I'm not

You are --> You're            You are not --> You aren't

He is / She is / It is  --> He's / She's / It's            He is not --> He isn't/She isn't/It isn't/

We are --> We're            We are not --> We aren't

You are --> You're            You are not --> You aren't

They are --> They're            They are not --> They aren't

To have :

I have   --> I’ve                   I have not --> I haven’t

you have --> You’ve           you have not --> You haven’t

He/she/it has --> He’s         He/she/it has not --> He hasn’t

We have --> We’ve             We have not --> We haven’t

you have --> You’ve           you have not --> You haven’t

they have --> They’ve        they have not --> They haven’t