Study materials
Ukrainian would use the bare word "phone" in both of these sentences. In English the difference is audible at once.
I need a phone.
I need the phone.
That is what articles are for. They are small words with which English announces whether a thing is new to the conversation or already known.
A and an: one of many
These two articles mean exactly the same. They go in front of a singular countable noun when you mention a thing for the first time, or simply say what somebody is.
This is a bag.
Anna is a doctor.
The difference between a and an is purely about sound. A goes before a consonant sound, an before a vowel sound. The sound, not the letter.
a university, a European city
an hour, an honest man
The: the same one you know about
The article the appears when your listener can work out which particular thing you mean. There are three usual reasons.
I see a dog. The dog is friendly.
Close the door, please.
The sun is hot today.
Unlike a, the sits happily with plurals and with uncountable words: the students, the water in this glass.
When there is no article
There is one more option people often forget: putting nothing at all. That is what happens when you speak about a plural or an uncountable thing in general, about all such things in the world.
Dogs are friendly.
Water is important.
Compare with the previous section: The dogs are friendly would mean particular dogs that you can both see.
Three questions that settle it
When in doubt, run down this chain. The first yes gives you the article.
| Question | If yes |
|---|---|
| Is this about all such things in general? | no article |
| Does the listener know which one I mean? | the |
| Is it one thing, mentioned for the first time? | a or an |
And one rule above all: a singular countable noun is never left bare. Something always stands in front of it, even if it is my or this.
The mistakes everyone makes
The first is leaving the noun with no article, the way Ukrainian does.
I have cat. → I have a cat.
The second is choosing the article by the letter instead of the sound.
a hour → an hour
The third is putting the where the whole world is meant.
The children need sleep. → Children need sleep.
All three are caught by one question. Does my listener already know what I am talking about? If yes, it is the. If no, it is a. If it is not about a particular thing at all, no article is needed.
Try it right now
Describe your morning in English in two sentences: name some object for the first time in one, and come back to it in the other.
If the first came out with a and the second with the, you have just done the thing articles exist for.