Are you sure about that 'S'?
Can you find the mistake in this sentence: 'I'm going to the cinemas today.'
I bet that was easy. No one says 'cinemaS'. The plural is unnecessary and wrong. Sure, people will be able to understand you even if you say 'I'm going to the cinemas today', but you sound funny. That was an easy example, but you probably make mistakes with unnecessary plurals all the time - especially in your emails. Check out our latest e-learning video to see if you are also making these common mistakes with plurals.