Some people believe in aliens.
Alien is a noun so use it in a sentence as a person
the legal alien had just got his Citizianship for the USA.
Maybe use it in "The Alien Resident entered the village.". It means a new, and not native, Resident.
helo there miy names is efrain and the answer for alien and sdition acts is
An alien ran down the street.
Her suggestion was completely alien to me.
The 1986 film "Aliens" is a sequel to it's 1979 predecessor "Alien" .
The nouns in the sentence are alien and scales.
The alien escaped on an spaceship. uhh that's wrong. you need a vowel after the an otherwise its just plain wrong "An alien escaped on a spaceship."
I can tell that is an alien space ship.
"The first contact with the alien was disconcerting." "The ways of foreigners are alien to us."
He came as an illegal alien and spent several years legalizing his status.
A translunar visitor is called an alien.