General | A/an | The | No article
There are two types of articles indefinite 'a' and 'an' or definite 'the'. You also need to know when not to use anarticle.
The bad news is that their proper use is complex, especially when you get into the advanced use of English. Quite often you have to work it out by what sounds right, which can be frustrating for a learner.
Indefinite articles - a and an (determiners)A and an are the indefinite articles. They refer to something not specifically known to the person you are communicating with.
A and an are used before nouns that introduce something or someone you have not mentioned before:-
|For example:||"I saw an elephant this morning." |
"I ate a banana for lunch."
|For example:||"I am an English teacher." |
"I am a builder."
|You use a when the noun you are referring to begins with a consonant (b, c, d, f, g, h, j, k, l, m, n, p, q, r, s, t, v, w, x, y or z), for example, "a city", "a factory", and "a hotel".|
You use an when the noun you are referring to begins with a vowel (a, e, i, o, u)
Pronunciation changes this rule. It's the sound that matters, not the spelling.
If the next word begins with a consonant sound when we say it, for example, "university" then we usea. If the next word begins with a vowel sound when we say it, for example "hour" then we use an.
We say "university" with a "y" sound at the beginning as though it were spelt "youniversity".
So, "a university" IS correct.
We say "hour" with a silent h as though it were spelt "our".
So, "an hour" IS correct.
(Lots of people get this wrong - including native speakers.)
Definite Article - the (determiners)There are two ways to pronounce "the". One "thuh" and the other "thee". To learn when we use them see the pronunciation files: How to pronounce "the".
Strong pronunciation Weak pronunciation
You use the when you know that the listener knows or can work out what particular person/thing you are talking about.
We usually use no article to talk about things in general:-
ที่มา : http://www.learnenglish.de/grammar/articlestext.htm