Learn the difference between singular and plural nouns. Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/partsofspeech/grammar-nouns/e/plural-and-singular-nouns?utm_source=YT&utm_medium=Desc&utm_campaign=grammar Watch the next lesson: https://www.khanacademy.org/humanities/grammar/partsofspeech/grammar-nouns/v/common-and-proper-nouns?utm_source=YT&utm_medium=Desc&utm_campaign=grammar Missed the previous lesson? https://www.khanacademy.org/huma