She was so vain that she spent hours in front of a mirror.
She spent hours in front of the mirror, preening and admiring her reflection, showing how vain she was.
His efforts were in vain.She was a very vain person.
I pray the soldiers did not die in-vain.
a sentence is do you know what vains is?
No because it would make very little sense
The doctor carefully examined the vane on the weather vane, looking for any signs of a vein abnormality as the patient anxiously hoped that the test results would not be in vain.
In vain is means not effective, useless For an example: His discussion about changing the uniform is in vain
The rescue attempt was in vain, as the weather got worse and the search had to be called off.
Vain means conceited, or it may mean to no avail. Here are some sentences.She tried in vain to stand on her head.He was as vain as a peacock."You're so vain!" (a song by Carly Simon)
This was just another vain attempt to repopulate the desert by moving a large group of people to this site. We've moved to this site in vain!
The adverb of the word "vain" is vainly.An example sentence is: "she vainly checks her hair again".
The correct punctuation for the sentence is: "Not only are you vain, you are also selfish and obnoxious." Add a comma after "vain" to separate the two independent clauses.