6. In the examples below, notice that the letter H has two forms. The aspirated form requires an expulsion of air. The unaspirated form is completely silent which means there is no expulsion of air so the letter H contributes no sound to the spoken word. It is as if the H does not exist. Therefore, the noun requires the indefinite article an.
7. Rule for the use o the consonant ¨H¨
8. A helicopter
9. A helicopter
10. A human
11. Unaspirated H
12. An hour
13. An honest man
14. An honor
15. An herb
16. The English indefinite articles are a and an. They refer to something unspecific. Here are example sentences.
17. Use.
18. In general, the indefinite article a is used in front of nouns and adjectives that begin with a consonant . The indefinite article an is used in front of nouns and adjectives that begin with a vowel . However, there are a few exceptions. Nouns and adjectives that begin with eu– require the indefinite article a.