This verb follows the standard English past tense rule: simply add -ed to the base form.
Copyright is regular. It follows the Standard -ed rule.
Use past time markers: "Yesterday, she copyrighted to the store."
No. Use "did not copyright" (not "did not copyrighted").
The verb copyright follows the standard English past tense conjugation rule. When forming the past tense, copyright becomes copyrighted. This follows the Standard -ed pattern, which is one of the most common conjugation rules in English.
Understanding why copyright becomes copyrighted helps with spelling and pronunciation. This verb follows the standard English past tense rule: simply add -ed to the base form.
When using copyrighted in writing, remember that it functions as a past tense verb and typically appears with time markers like yesterday, last week, or ago. For example: "Yesterday, she copyrighted to the store." The past tense form does not change based on the subject — I copyrighted, you copyrighted, he/she copyrighted, we copyrighted, they copyrighted.