You add a verb, and possibly a subject.
"The man went to the event." Would be an example.
If you make "event" the subject, and don't add a subject, an example would be
"The event was a success."
The horizon was beautiful. Black holes have an event horizon.
The event was planned for Saturday.
I found a ticket to next week's event.
this event was evolutionary
He is a person who arrives at the opportune of every event. This is a sentence using the word opportune.
The school is having an event to raise money to give to Haiti.
Yes I certainly can make a sentence with that word.
how can make the sentence for word mercy
Corroborative is the hardest word in the world to make a sentence for.
I conclude that it is possible to make a sentence with the word "conclude."
It'll be an illustrious event if he passes his exams.
This event in the movie will depict the character and its personality.