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