Websites:
* Grammarly: Offers a comprehensive grammar guide with clear explanations and examples. [https://www.grammarly.com/blog/grammar-rules/](https://www.grammarly.com/blog/grammar-rules/)
* Oxford Learner's Dictionaries: Provides definitions, examples, and explanations of grammar points. [https://www.oxfordlearnersdictionaries.com/](https://www.oxfordlearnersdictionaries.com/)
* Merriam-Webster: Offers a dictionary, thesaurus, and grammar guide. [https://www.merriam-webster.com/](https://www.merriam-webster.com/)
* Purdue OWL: A great resource for students, with detailed explanations of grammar points and writing tips. [https://owl.purdue.edu/](https://owl.purdue.edu/)
* Grammar.com: A user-friendly website with explanations, examples, and quizzes for various grammar points. [https://www.grammar.com/](https://www.grammar.com/)
* English Grammar Today: A comprehensive guide from Cambridge University Press. [https://dictionary.cambridge.org/grammar/british-grammar/](https://dictionary.cambridge.org/grammar/british-grammar/)
Books:
* The Elements of Style by Strunk & White: A classic guide to grammar and writing style.
* Woe Is I by Patricia T. O'Conner and Stewart Kellerman: A humorous and informative book on grammar.
* English Grammar in Use by Raymond Murphy: A comprehensive guide for learners of English.
* A Dictionary of Modern English Usage by H.W. Fowler: A comprehensive guide to grammar and usage.
Other Resources:
* Your local library: Many libraries offer resources for grammar and writing.
* Online forums: Search for forums or communities dedicated to language and grammar.
* Grammar apps: There are several apps available that can help you learn and practice grammar.
* Your teacher or tutor: If you are learning English as a second language, your teacher or tutor can provide personalized guidance.
Tips for Researching:
* Be specific: Use clear keywords to search for the grammar point you are looking for.
* Consider your audience: If you are writing for a specific audience, research grammar rules that are relevant to them.
* Look for multiple sources: Get information from several sources to ensure accuracy and completeness.
* Practice: The best way to learn grammar is to practice using it.
Remember that grammar is a constantly evolving system, so it's important to stay up-to-date with current usage.