He done this because he was threatened by the police officer.
I have seen somewhere in a text that an Asian author wrote his statement like above so, I am confused shall we use done like this or we are not recommended use such weird English structure?
And I thank you in the case that clearly explain for me the use of done on such a sentences.
He done this because he was threatened by the police officer.
Done is used as the past simple of the verb do. I do not know why an Asian writer would use this construction. Do you have a link to the book, or can you remember the book's name?
Done is the past simple of do in the dialect of English spoken throughout the southern United States. Not all people in this area always use done in this way. Because people can use both dialect English and standard English. For example, I am from the American South, and I can speak this dialect when I want to sound like I am from the American South.
However, some people only speak dialect English. An unfortunate occurence is that such people are seen as speaking an "inferior" or, as you put it, a "weird" form of English, because of the way their dialect differs from standard English. And such people can be seen as "ignorant," meaning not only uneducated but stupid.
Famous authors of the South who wrote using a Southern dialect include
Mark Twain
Frederick Douglass
William Faulkner
Katherine Anne Porter
Margaret Mitchell
Harper Lee
James Dickey
Walker Percy
James Lee Burke
My suggestion for English learners is to first learn standard English. Dialects contain not only grammatical constructions that differ from 'standard English' but also employ different words for things. And of course pronunciation is a huge identifying factor.
Wikipedia has an article about this dialect at this link.
The dialects of American English commonly known collectively in the United States as Southern are spoken throughout the Southern United States, from the southern extremities of Ohio, Maryland, and Delaware, as well as most of West Virginia and Kentucky to the Gulf Coast, and from the Atlantic coast to most of Texas and Oklahoma, and the far eastern section of New Mexico. The Southern dialects make up the largest accent group in the United States.
In this dialect done can be used in the following ways:
1) as the past simple of do -- this is how the word done is used in your sentence.
I done what you told me.
2) as an auxillary verb before a main verb to mean the past tense:
I done told you to stay away from Boo Radley.
I done asked (or axed) the man what time breakfast was.
These two uses can naturally be combined:
I done done it.
Done is the past participle form of the verb to do. It needs another verb to help it, an auxiliary verb:
He has done this because he was threatened by the police officer.
The verb has serves as an auxiliary to done, and as a result we have a sentence in the Present Perfect tense. The auxiliary has here helps create the perfect tense.
In "standard" English, you cannot use the past participle form done without some auxiliary before it. You may use it in some dialect (see CarSmack's answer).
You can use the word done without an auxiliary only when you use it as an adjective:
The potatoes are done! (they are ready to eat: done is an adjective here, like in "the potatoes are brown")
This biathlete missed three targets. He is done. (he is doomed to fail in this competition)
If you want to use to do in a past sense without an auxiliary, you should put it in another form: did:
He did this because he was threatened by the police officer.
