คำนำหน้านามเอกพจน์ที่ไม่ได้กล่าวถึงมาก่อน, เช่น a, an
ตัวอย่างประโยค
She contributed an article to the newspaper.
The article is genuine.
These articles are not for sale.
Do you have any tax-free articles?
This article is cheap.
Have you read this article?
Is it possible to reprint this article?
I clipped some articles out of the newspaper.
That article is out of stock.
The article is nowhere to be had.
There are many articles in her purse.
I write articles regularly.
When the articles of incorporation are complete it is essential to go to the notary public's office to undertake certification of the articles drawn up.
Between ourselves, this article is selling slowly.
The precision ratio is an index that indicates how many articles meet the search criteria out of all of the articles retrieved.