How to distinguish the usage of articles?

1, indefinite articles a and an, before singular countable nouns;

2. If the consonant is at the beginning of the word, add an A before the word;

3. If the vowel is placed at the beginning of the word, the an word before the word will not be forgotten;

4. There are quite a few indefinite articles, but the concept of number is not emphasized;

5, the indefinite article is very important, four fingers in the heart. (Each finger, general finger, general finger and specific finger)

Extended data:

Matters needing attention

1, in some cases, a (or? An) can be used before the plural form: Is there an A in the idiom? Very few (books), a? A large number of (books) and other representations.

2. Before phrases that express time or money, such as? Answer? In five minutes.

3. Before some words that are plural in form and singular in sense, such as? Answer? Barracks, a? Links. In American spoken language, for example? Answer? Good idea, a? A long road.