If you eat one chocolate, and then another, and then another, then you'll have eaten lots of chocolates. This is called a plural (and potentially an upset stomach).
But plurals aren't always as easy as just adding an -s to the end of the word. See if you can get all of these right!
The collective noun quiz: Do you know your herds from your hordes?
Test your animal knowledge with our crafty collective nouns quiz.
The deviously difficult dead word quiz
Do you know what words we no longer use? Take our quiz to find out.
The gruelling grammar quiz
If you think you know your past participle from your pluperfect tense, test yourself here.