How do I answer a long answer question? I feel like I haven't got enough to say?

When answering say a 40 mark question its important to remember depth not breadth. Of course you want to cover as much material as possible and show the examiner how hard you've revised and how much knowledge you have, but it's about how you present the knowledge and what is appropriate at the time. For example: say the question is "To what extent has the UK suffered a participation crisis in the last 10 years?" (25). You need to address only the last ten years first off. Theres no point in referring to something that happened 50 years ago as it just isnt relevant to the question. Make a plan of three points, two for, one against and present your argument in a clear and concise manner. So perhaps you would discuss decline in voter turnout, which I'm sure you will have some facts up your sleeve about to show your point. You could also raise the idea of sofa politics? And declining party membership? Does that make sense? It's about providing enough depth on each issue, not lots of issues.