The word O.K., okay, OK, however you want
to spell it, is apparently the most used
word around the world.

It is extremely useful - there are many
ways to use it and it has a few different
meanings.

Let's have a look in detail in this blog.

Here are some misuses
I hear from my students:

Teacher: Do you have any questions?

Student: OK. X
(OK here means yes, meaning
you do have a question.)

You should say
- I'm OK. This means that
you don't need to ask a question.

Anything OK. X →Anything is OK.◎

Here are some ways you can use OK:

【As an adjective】

OK can mean acceptable

I fixed the problem so your car
is OK now.

OK can mean mediocre
(not good / not bad)

The fries were great, but the
burger was just OK.

【It can be an adverb】

How was my skiing?

You did OK for your first time

【As a noun】

It can mean permission.

The boss gave me the OK to
send out the new brochures.

【As a verb】

It can also mean give permission.

The boss OKed the order.

And finally

A-Okay!

This is a stronger version of OK.
It means that everything is good.

本日はJames先生にOKの使い方について

ブログで紹介してもらいました＾＾

OKを正しく使ってみて下さいね☆