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