In general, to form plurals in English, you add either -s or -es (and sometimes change a y to an i). But there are a number of words – including some you use every day – that don’t follow this rule.

Here's a rule about singular and plural forms that is useful to know when talking about different types of fish. Let's find out more below! There are two plural forms for the word 'fish': 'fish' and ...

Usually English plurals are pretty easy. Just add s: one dog, two dogs. We know some plurals don't use s: children, deer. There are some nouns that we seem to use only in the plural: thanks, ...

The word data leaves some of us in a conundrum. Data is the plural of datum, the Latin word for something given. Ordinarily, the plural word would get a plural verb. The chickens are on their nests.

Test your knowledge of English plural forms! Can you identify the correct plural for words like cactus, mouse, and tooth?

Algae thrives in sunlight. Or is it algae thrive? These are the questions that can broadside a copy editor years, even decades, into her career. When it comes to English, there’s never a point where ...

Take our English quiz and find out if you know the plurals of these tricky words. Is the word 'sheep' singular or plural? What is the plural form of 'information'? While you can derive the plurals of ...

Fish don’t know they’re wet, and we English speakers don’t know we’re weird. Have you ever thought about how odd it is that English uses the same word for “you” in the singular and the plural?