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