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