This verb follows the standard English past tense rule: simply add -ed to the base form.
Proof is regular. It follows the Standard -ed rule.
Use past time markers: "Yesterday, she proofed to the store."
No. Use "did not proof" (not "did not proofed").
The verb proof follows the standard English past tense conjugation rule. When forming the past tense, proof becomes proofed. This follows the Standard -ed pattern, which is one of the most common conjugation rules in English.
Understanding why proof becomes proofed helps with spelling and pronunciation. This verb follows the standard English past tense rule: simply add -ed to the base form.
When using proofed 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 proofed to the store." The past tense form does not change based on the subject — I proofed, you proofed, he/she proofed, we proofed, they proofed.