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