This noun follows the standard English plural rule: simply add -s to the singular form.
Questionnaire is regular. It follows the Standard -s rule.
Use plural verbs: "The questionnaires are ready" (not "is ready").
Yes. The plural questionnaires is standard across all English variants.
The word questionnaire follows the standard English pluralization rule. When forming the plural, questionnaire becomes questionnaires. This follows the Standard -s pattern, which is one of the most common plural rules in English.
Understanding why questionnaire becomes questionnaires helps with spelling and pronunciation. This noun follows the standard English plural rule: simply add -s to the singular form.
When using questionnaires in writing, remember that it functions as a plural noun in sentences. It pairs with plural verbs and pronouns. For example: "The questionnaires are ready" (not "is ready"). This subject-verb agreement is essential for grammatical correctness.