17-05-2016, 08:08 PM
It's not to do with whether it is a vowel, rather the sound it makes - if it's a vowel sound, then it should be "an" vs consonant sound it should be "a"... For example "an umbrella" and "an hour" start with consonants, but are pronounced with a vowel sound.
Therefore it completely depends on regional accents.
You should pronounce it "Aitch Dee Eye" because that's the official way, however whilst the correct spelling and pronunciation would be "aitch" a lot of dictionaries would suggest that pronouncing it "Haitch" would be acceptable these days.
Therefore should be written "an HDi" as that's the official spelling, however in spoken English "a HDi" would be acceptable also.
Therefore it completely depends on regional accents.
You should pronounce it "Aitch Dee Eye" because that's the official way, however whilst the correct spelling and pronunciation would be "aitch" a lot of dictionaries would suggest that pronouncing it "Haitch" would be acceptable these days.
Therefore should be written "an HDi" as that's the official spelling, however in spoken English "a HDi" would be acceptable also.
