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