“Has been” is used in the third-person singular and “have been” is used for first- and second-person singular and all plural uses. The present perfect tense refers to an action that began at some time in the past and is still in progress.

‘Is been’ is grammatically wrong,when you use the word ‘been’ you’re reffering the past or ongoing action that started in the past,while ‘is’ is indicating present action. So,’has been’ is the correct one.

First, “I am done”. So “I”’ is our subject, “am” is our verb and “done” is our adjective. “I am done” is a simple present tense statement. So, “I am done”, a present tense sentence, means I am in the state or I am in the condition of being finished with something.

There is no rule against using done to mean finished. Upon the completion of a meal for example, you are allowed to say “I’m done” or “I’m finished.” However, some incorrectly continue to attest to the outdated adage “people are finished, food is done.”

Here are a few possibilities:

1. I’ve completed it.
2. I got it done.
3. It’s over. / It’s complete.
4. That’s it for me. / That’s all for me.
5. I’m out.

Okay and OK mean the same thing. Okay and OK are two acceptable spellings of the same word. There’s no difference between OK and okay. The older term, OK, (possibly) derived from an abbreviation for an intentional misspelling of “all correct.” The terms are both standard English.

Gretchen McCulloch, an internet linguist and author of the upcoming book Because Internet, said OK is not inherently rude but the length of a reply matters. “Anything that’s shorter can sound curter, anything that’s longer can sound more polite,” McCulloch said.

OK (spelling variations include okay, O.K., and ok) is an English word (originally American English) denoting approval, acceptance, agreement, assent, acknowledgment, or a sign of indifference….Variations.

It was said that, in order to save time and avoid a useless headcount, regiments that had no deaths would hold up a sign with the letters “OK” on it, standing for “Zero Killed”.

Charles Gordon Greene

In the case of O.K., the abbreviation is of “oll korrect.” Probably further popularized by use as an election slogan by the O.K. Club, New York boosters of Democratic president Martin Van Buren’s 1840 re-election bid. It refers to his nickname Old Kinderhook, from his birth in the N.Y. village of Kinderhook.

A more likely explanation is that the term originated as an abbreviation of orl korrekt , a jokey misspelling of ‘all correct’ which was current in the US in the 1830s. The oldest written references result from its use as a slogan by the Democratic party during the American Presidential election of 1840.