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