Grammar

For aspects of writing beyond sentences such as sentence linking and paragraphing, look also at the pages on writing.

Diagnostic Testing
A good starting point for grammar can be to check what you know and don't know.

Typical grammar labels from low to high level and go to links for tests https://www.grammar-quizzes.com/diagnosum.html

If you want to test your grammar with a reference to two books that explain grammar, this could be useful https://www.world-english.org/diagnostic_grammar.htm When you check the test, it refers you to pages from two well-known books on English grammar: Murphy, and Swan.

Grammar activities
Many websites contain a variety of activities and are worth exploring. Below are a few examples of some of the best.

This website has detailed descriptions of grammar and practice activities http://guidetogrammar.org/grammar/index.htm

You will also find many important categories of grammar covered in this section from Griffith University, whether the area is listed under grammar or academic skills. Note useful additional links on those pages to other sites.

Specific aspects of grammar
There is a good list of typical issues in academic writing at University of Bristol with links to more detail. Also, University of Bristol has a page that explains some of the key grammar terminology.

Punctuation
https://www.lexico.com/grammar/punctuation

Clauses and joining to make compound and complex sentences
What is a sentence? There is an explanation here from Leicester University, which helps to understand the other building blocks and elements listed below.

Dependent and independent clauses from OWL at Purdue.

Relative clauses from Hong Kong Polytechnic

That clauses from Hong Kong Polytechnic and here from a site called Lexico

Common errors in sentence and clause usage include something called 'sentence fragments', which is when you have not completed the sentence. You can find more information on this youtube video from OnScreen academy.

Hedging
For a definition of hedging, see Wikipedia.

https://www.griffith.edu.au/international/englishhelp/hedging-and-boosting

Books
If you are currently a student at university, you may find some of these books in electronic version.

Bailey, Stephen. Academic Writing : A Handbook for International Students, Taylor & Francis Group, 2017