COUNTABLE AND UNCOUNTABLE NOUNS

It’s the day of Oliver and Alfie’s cooking competition. Daisy is filming the chefs in action, and Mum is on her way home.
 
http://learnenglishteens.britishcouncil.org/grammar-vocabulary/grammar-videos/countable-and-uncountable-nouns
 
Some nouns in English are countable - we can use them in singular and plural forms; and some are uncountable - they only have one form.
 
We often use a/an with singular countable nouns and some with plurals. We can also use some with uncountable nouns.