Correct spelling, explanation: turns is an Old English word that looked as turnian or tyrnan. Over the centuries, however, the form of the word has changed and today we have the base form turn, which in the third person singular in the Present Simple tense changes to turns. Grammatically, turns can be either a verb or a plural noun.

Definition of turns:
1. verb (3rd person singular in the Present Simple) – to move something, to change your direction, to suddenly become different,
2. noun (plural) – when it’s your time to do something, after or before another person,
She turns her things upside down every time she wants to find her favorite shoes.
Every time she turns right on the corner she has a chat with a local fruit seller.
Take your jacket in case the weather turns cold.
Let’s take turns doing the dishes – it will be fair, then.

Idioms with turns:
Some common idioms include:
1. twists and turns – when something is complicated and difficult to deal with,
I have no idea how to do this task – it’s all twists and turns.
2. turns over a new leaf – to start behaving better,
Every year on the 1st of January she turns over a new leaf and gives up smoking.
3. turns your nose up at something – when you feel that something is not good enough for you so you do not accept it.
He’s been offered so many great jobs, but he turns his nose up at all of them.

Incorrect spelling, explanation: one of the basic grammar rules states that we add the -es ending to a verb or a noun when it ends in -s, -sh, -ch, -x, -z. Otherwise, we simply add the -s ending. Many English users, however, find this rule confusing and that’s why a common mistake is to spell the word turns as turnes, which is wrong.