Some words become plural in different ways, like 'child' to 'children'. Learn these exceptions. You would not pluralize 'mouse' by adding 's', it's 'mice'.
Pro Tip 2/3
Ending Variations
Words ending in 'y' or 'o' may need a change before adding 's' or 'es'. To pluralize 'baby', change the 'y' to 'i' and add 'es' to make 'babies'.
Pro Tip 3/3
Pronunciation Shifts
Pluralizing can change word stress or sound, affecting how we pronounce them. We pluralize 'analysis' to 'analyses' with a different final sound.