English grammar is the set of structural rules used in the English language to express comprehensive and coherent thoughts. This includes the proper usage and structure or words, clauses, phrases, and sentences. There are some dissimilarities between the grammars of the three most common English languages (British English, American English, and Australian English), but they are minor and subtle as compared with their dissimilarities in the meaning of words, accent, and pronunciation. Grab The Easy Study Guide now!