Grammatical number

Grammatical number is like counting how many things there are. When you have just one thing, we call it singular. For example, if you have one apple, that's singular. But when you have many things, we call it plural. For example, if you have many apples, that's plural.

To change a word from singular to plural, we usually add an "s" to the end of the word. So, "apple" becomes "apples" when we have more than one.

But sometimes, we have to do more than just add an "s". Sometimes, we have to change the word entirely. For example, if you have one mouse, that's singular. But if you have many mice, you can't just add an "s". You have to change the word to "mice".

It's important to know when to use singular and when to use plural in a sentence so that people understand how many things you are talking about.