A [eɪ]1) [C/U] the first letter of the English alphabet2) A[C/U] a mark that a teacher gives to a student's work to show that it is excellent3) A[U] a common BLOOD GROUP•from A to B — from one place to another[/ex]A to Z — British a book of maps showing all the roads in a particular town[/ex]IIdeterminera */*/*/weak [ə] ; strong [eɪ]; an weak [ən] ; strong [æn] summary: A and an are indefinite articles. ■ A is used when the next word begins with a consonant. ■ An is used when the next word begins with a vowel sound.1) used when you are mentioning a person or a thing for the first timeI have an idea.[/ex]There's a concert on Sunday night.[/ex]2) oneI have a sister and two brothers.[/ex]a hundred/thousand/million[/ex]3) used when you mean any person or thing of a particular type, but not a specific oneHave you got a car?[/ex]Children must be accompanied by an adult.[/ex]4) used when you say what job someone doesRuth was a lawyer.[/ex]I want to be an actor.[/ex]5) used when you say what type someone or something belongs toMaria is a Catholic.[/ex]Greece has been a republic since 1973.[/ex]6) used before a singular noun that represents every person or thing of a particular typeA dog needs regular exercise.[/ex]A molecule consists of two or more atoms.[/ex]7) used in phrases showing prices, rates, or speeds to mean ‘each' or ‘every'Meetings are held four times a year (= four times every year).[/ex]Tomatoes are £1.20 a kilo (= each kilo costs £1.20).[/ex]90 miles an hour[/ex]8) used in expressions of quantity such as ‘a lot', ‘a few', or ‘a great deal'a lot of money[/ex]a bit of luck[/ex]We all appreciate a little encouragement.[/ex]9) used before a noun that is formed from a verb and means a single action of that verbCan I have a try?[/ex]Let's take a walk round the garden.[/ex]
Dictionary for writing and speaking English. 2014.