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