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