Unfortunately, there are also exceptions to the exceptions when it comes to the plural form of nouns!
However they're not difficult, they just need to be remembered. Follow these two simple rules :
1. Words ending in 'z', 's' and 'x' do not change in the plural form.
2. The following words form their plural with an '-s' (despite the rule explained on page 1) :
bal – pneu – cou – détail – fou – clou
Now test your understanding with the following quiz : Plurals Quiz 2