A vs An British English Grammar

The video tutorial explains the use of the articles 'a' and 'an' with countable nouns. 'A' is used when the noun begins with a consonant sound, while 'an' is used for vowel sounds. The tutorial highlights the importance of focusing on sounds rather than letters, using examples like 'hour' and 'university' to illustrate exceptions. It concludes with a reminder that these articles are used with singular countable nouns.

Provide examples of words that start with a consonant letter but have a vowel sound.

What is the significance of using articles with singular countable nouns?