Verbs ending in a consonant followed by -y change the -y to -ied in the past tense form.
Security is regular. It follows the -ied Conversion rule.
Use past time markers: "Yesterday, she securitied to the store."
No. Use "did not security" (not "did not securitied").
The verb security follows the standard English past tense conjugation rule. When forming the past tense, security becomes securitied. This follows the -ied Conversion pattern, which is one of the most common conjugation rules in English.
Understanding why security becomes securitied helps with spelling and pronunciation. Verbs ending in a consonant followed by -y change the -y to -ied in the past tense form.
When using securitied 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 securitied to the store." The past tense form does not change based on the subject — I securitied, you securitied, he/she securitied, we securitied, they securitied.