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