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Vertebrae, bacteria and cacti: Forming plurals in English 2 – About Words – Cambridge Dictionary blog
American English at State - For singular nouns that end in -um, the ending must change to -a to make them plural. For extra practice, see if you can make the additional
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Bacteria" and "criteria" are PLURAL nouns. Their SINGULAR forms are " bacterium" and "criterion," respectively. #grammar #b… | Grammar tips, Nouns, English lessons
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