Nouns ending in a consonant followed by -y change the -y to -ies in the plural form.
Summary is regular. It follows the -ies Conversion rule.
Use plural verbs: "The summaries are ready" (not "is ready").
Yes. The plural summaries is standard across all English variants.
The word summary follows the standard English pluralization rule. When forming the plural, summary becomes summaries. This follows the -ies Conversion pattern, which is one of the most common plural rules in English.
Understanding why summary becomes summaries helps with spelling and pronunciation. Nouns ending in a consonant followed by -y change the -y to -ies in the plural form.
When using summaries in writing, remember that it functions as a plural noun in sentences. It pairs with plural verbs and pronouns. For example: "The summaries are ready" (not "is ready"). This subject-verb agreement is essential for grammatical correctness.