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