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