It is important to distinguish between Countable Nouns and Uncountable Nouns in English. Because their usage is different in regards to both determiners and verb. 1. Countable Nouns Countable nouns are for things we can using numbers. They have a singular and a plural form. The singular from can use the determiner “A, Or, and An”. If you want to ask about the quantity of a countable nooun, you ask “How Manny?” combined with the plural countable noun. Singular Plural One dog Two dogs One horse Two horses One idea ...