No, the grammar that is there is just what has been added to the site so far.
Think of the IELTS test as an English test - there is not certain grammar that is suitable, though on these pages I relate it to IELTS so I can show you how it can be used.
Complex sentences and clauses are important as you need to be able to use these properly in the test, but all grammar generally is important.
Listen to an IELTS debate on the brain drain, explaining what it means, with clear arguments for and against, key vocabulary, and opinion language to support speaking and writing tasks.
Improve your IELTS opinion and argument skills with a series of topic-based lessons that include listening practice, key ideas, useful vocabulary, and natural opinion language.
Explore an IELTS Debate on Rural to Urban Migration with clear arguments for and against, useful vocabulary, and practice materials to help you develop strong speaking and writing skills for the IELTS…
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