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