Can you put a comma before 'and'? What exactly are verbs? And what's the difference between a hyphen and a dash?

Find out why grammar matters, which bits matter most, how to avoid getting things wrong and when and how punctuate for clarity and meaning. It's only by understanding the building blocks of language that you will gradually gain confidence as a writer - not just so as to avoid mistakes, but also so as to manipulate words to do what you want them to.