I have a severe headache.
i have several things in my story
There are several species in the world.
The words "several" and "Australian" are adjectives in the sentence.
No. It does not have a verb.A correct sentence might be "Several fish are in one tank."
There isn't one.
Several policies applied to the man's execution.
You can use "cracks" in a sentence like this: The vase fell off the shelf and now has several cracks in it.
Example sentence - The grand hall was decorated with several ornate antique swords.
you don't
He has had several chances to pass the test.
Several, high
Several students like to study in the mornings.