"To be" in the negative form of the present simple (am not/is not/are not)
The negative form is the same as the positive form but with the word not after am, is, are.
Two short forms are possible.
The first one is the positive short form + not. For example, he's + not → he's not.
The second one is a merging of are+not / is+not, where "not" gets an apostrophe instead of "o". For example, we are + not → we aren't.
|Negative form||Negative short forms|
|I am not||I'm not||-|
|you are not||you're not||you aren't|
|he is not
she is not
it is not
|we are not||we're not||we aren't|
|they are not||they're not||they aren't|
I'm not interested.
It isn't cold today.
She's not at home, she's in the park.
We aren't hungry, we're thirsty.
They're not busy right now.