This is essential for improving both your accuracy in punctuation and expression. It much easier to show your understanding of texts if you are up-to-speed with this key AO1 skill. The links below will enable you to do this independently!
BBC Skills Writing and links to other skils
Exercises in grammar and punctuation by Bristol University
If this does not work for you, why not try a video or a song from You Tube which focuses on the skill you need to learn? I like this video as it rams home the message home in memorable way. Find the right
Here's a link to the Nazi Grammar Police, a play on a recent Quinton Tarantino film and it's very clever, too. Link to The Grammar Nazis