To be: affirmative and negative short forms
Reminder: the verb to be is irregular. To be, present simple tense
In affirmative and negative phrases, to be can also be conjugated in its short forms:
AFFIRMATIVE
I'm
You're
He/She/It's
We're
You're
They're
NEGATIVE
I'm not
You're not / You aren't
He/She/It's not / He/She/It isn't
We're not / We aren't
You're not /You aren't
They're not / They aren't
You're French.
Magda's not a doctor / Magda isn't a doctor.
The short forms are frequently used, especially in informal situations.
You’re tall.
It’s not a good idea.
With the exception of the subject I, all subjects have two negative short forms, which can generally be used interchangeably.
You're not a teacher / You aren't a teacher.
She's not my cousin / She isn't my cousin.
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