When to use "a" or "the"?

Question

Could someone please explain when to use a/an and the?  I always get confuse...  Thank you in advance.

Ivanhr · Accepted Answer

Try googling the English article system. Or write a couple of sentences containing articles  and then we'll  check them for you.

CalifJim · Answer

Anonymouswhen to use a/an and the?

That's too big a subject to cover thoroughly in a forum post, but here are a few points to keep in mind.

Use "the" when you have a specific entity in mind. The use of "the" is the speaker's way of saying that we don't have to ask "which?" Everyone knows which one already.

Use "a/an" when you don't have a specific example of a thing in mind -- when it's not important which one.
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I want to clean the table. Please hand me a paper towel.

In the sentences above, the speaker is talking about a specific table. He and his listener can both see the table. The listener does not have to ask "Which table?" because the table is there and it's the only table there. In contrast, a request is made for a paper towel. It doesn't matter which paper towel is used to clean the table. Many paper towels are available, but any paper towel will do the job.
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But suppose the situation were different.

I want to clean a table. Please hand me the paper towel.

Here it appears that there may be many tables to clean, and the speaker wants to clean any one of these tables. It doesn't matter which one. It also appears that there is only one paper towel somewhere nearby. The use of "the" with "paper towel" means it should be obvious which paper towel is meant, so most likely there is one paper towel somewhere where both the speaker and listener can see it.
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The choice of "a/an" or "the" depends on what is in your head -- what you mean. So the choice depends on the situation you find yourself in. There is often no "correct" choice.

CJ

When to use "a" or "the"?

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