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