Uncountable nouns cannot be counted in terms of number They do not have ‘singular’ or ‘plural’ forms. They fall into the following groups: • mass/quantity: sugar, sand, hair, dust, etc. • liquids: water, milk, oil, ink, honey, etc. • gases: steam, mist, nitrogen, air, etc. • abstract nouns: names, states, qualities, processes, actions, ideas, etc. such as courage, happiness, freedom, attention, childhood, honesty, enjoyment. • branches of learning: Economics, Mathematics, Politics, etc.