The verb agrees with the subject in number. A singular subject takes the -s form (he works); a plural subject does not (they work).
Wrong → right
Common mistake
Corrected
She go to school.
She goes to school.
The files is ready.
The files are ready.
Everyone have finished.
Everyone has finished.
The news are good.
The news is good.
One of my friends live here.
One of my friends lives here.
There is many reasons.
There are many reasons.
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