There is no one-size-fits-all answer to this question, as the grammar you will need for IELTS will depend on your level of English and the IELTS band score you are aiming for. However, there are some general tips that can help you improve your grammar for IELTS.
Here are some tips for improving your grammar for IELTS:
-Practice using a wide range of grammar structures. The more grammar structures you are familiar with, the easier it will be to use them correctly in your IELTS essay or speaking test.
-Make sure you understand the meaning and use of each grammar structure before you try to use it in your IELTS test. There is no point memorising a grammar structure if you don't understand when or how to use it.
-Pay attention to grammar when you are reading or listening to English. This will help you to become familiar with common grammar structures and how they are used in context.
-Practice using grammar structures in your own writing and speaking. The more you use them, the more confident you will feel using them in your IELTS test.
-Get some feedback on your writing and speaking from a teacher or tutor. They will be able to point out any areas where your grammar is not accurate or errors you are making frequently.
-Finally, don't try to learn too much grammar at once! focus on a few structures at a time and make sure you are using them correctly before moving on to new ones.