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The three present forms of the most important verb

I am - you are - he is

How to use this sheet

English speakers use this verb to say who they are, how they feel, and where things are - no other verb appears more often. It has three different present forms, and the subject alone decides which one you need. The table gives every subject with its full form, the short spoken form, and both ways of making it negative.
Each row is one subject. The second column shows the full form, the third the short form used in speech and informal writing, and the last two columns show the negative and its short form.
SubjectFull formContractionNegativeNegative contraction
II amI'mI am notI'm not
youyou areyou'reyou are notyou aren't
hehe ishe'she is nothe isn't
sheshe isshe'sshe is notshe isn't
itit isit'sit is notit isn't
wewe arewe'rewe are notwe aren't
theythey arethey'rethey are notthey aren't
my brothermy brother ismy brother'smy brother is notmy brother isn't

In use

I'm tired, but the kids are ready to go. She's a nurse at the hospital in town. We aren't late - the bus is early.

Watch out

They is in the kitchen.

In many languages you can leave this verb out before an adjective or a place word; in English it is never optional. If you feel your sentence has no verb, it is almost always this one that is missing. Notice the last row: a singular noun subject behaves exactly like the subjects in rows 3 to 5.
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