Out of curiosity, there you go some of the main patterns (rules) of irregular plural forms in the English Language. If you are interested in learning more about the regular plural forms, just click here.
1. Some words (nouns) that end in ‘-f‘ or ‘-fe‘ change ‘-f‘ or ‘-fe‘ to ‘-ves‘:
3. Some words still have their plural form as it was in Old English:
Nouns that end with ‘o‘ are really tricky sometimes. We can postulate rules, but they are so confusing to learners of English that they are not going to be mentioned here. There are also the cases of English words which come from other languages (borrowed words), especially from Latin or Greek. It’s not possible to mention all of them here.
Thus, keep in mind that the real best way to learn the plural forms of English nouns is to have a very good dictionary at hand. So, when in doubt, look up the word in the dictionary to check its plural form.
For example, say that you are not sure about the plural form of “photo“. Then, you go to Meriam-Webster Online Dictionary and type the word there. When you get the result for your search, you get the following information:
Notice that you have the plural form of the word in there. In my opinion, it’s way better to check a dictionary than trying to memorize rules and their exceptions.
by Denilso de Lima – ELT Professional, Freelance Teacher Trainer, Book Author and Freelance Researcher, home-based in Curitiba, Paraná, Brazil.
Profissional da Área de Ensino da Língua Inglesa. Palestrante. Autor. Pesquisador. Teacher Trainer. Responsável pelo Inglês na Ponta da Língua (blog, fanpage, cursos). Mais de 15 anos atuando na área de ensino de inglês e 7 na área de formação de professores de língua inglesa.