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A basic "handbook" of parts of speech, sentence structures and punctuation with examples for reference purposes. Clean website makes it easy to read/find rules of basic grammar

Excellent resource clearly listing all comma rules with examples.

A handy clear guide to all the rules for writing numbers with examples given - great for essay writing/editing.

Tutorial on adjective forms and usage with plenty of examples, and a 10 question interactive quiz at the end.

This site has very useful examples, along with a list and a definition, showing how prepositions work in a sentence.

A comprehensive list of answers to commonly-asked grammar questions, such as "'alot' or 'a lot?'" Also contains basic punctuation tips.