a/an (The indefinite article)

---

Administrador on 13:47

---

• The form a is used before a word beginnig with a consonant, or a vowel with a consonant sound:

           a man             a hat               a university             a European
           a one-way street

• The form an is used before the word beginnig with vowel (a,e,i,o,u) or words beginnig with a mute h:

           an apple         an island               an uncle       an egg

          an onion         an hour

• Or individual letters spoken with a vowel sound 

            an L-plate       an MP        an SOS   an "x"

Filled Under: