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Normally the plural will include the letter e, as when potato becomes potatoes, and tomato becomes tomatoes, although as is usual in English language, there are excepetions, such as Commando which can become Commandos OR Commandoes.

Other well-known rules of English are similarly flawed, such as spelling i before e except after c... the word weird breaks this rule.

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14y ago
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1w ago

For nouns ending in 'o', you generally add -es to form the plural. However, there are exceptions where you simply add -s. Examples: potatoes (regular plural) and pianos (irregular plural).

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Q: What is the grammatical rule about making a plural form of a singular noun that ends in an 'o'?
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we don't really know but if u do ANSWER IT


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