You just need to learn all the different techniques like short sentences, allieration, personfication ..... and so on.
Then learn the reasons why they do this. e.g. short sentences are used to create suspense and tension. Also, practise grammer like the reasons for semi colons or certain punctuation.
Then in your exam if it comes up in the text you will know the reasons why things are written a certain way. Other than that you can't really revise for enlish unless you know what the fiction or non fiction text is.