amazing 為什麽用an不用a

因為amazing的第壹個讀音是元音字母，根據語法規則，要用an，而布恩那個用a。a用於輔音讀音開頭的單詞前。如：an apple, an egg, an eight-year-old boy, an honest girl, an hour.

再如：a country, a European country, a UFO