It is important to note that modern linguistics has evolved. The corpus data used in 1973 (the Survey of English Usage ) is tiny compared to modern corpora like COCA (Corpus of Contemporary American English) or the British National Corpus (BNC). Consequently, some of the frequency claims in Quirk & Greenbaum are dated.

Are you focusing on a for your essay, such as verb aspects or regional dialects?

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: It retains the structure of its parent book for easy cross-referencing while offering a more economical and concise presentation.