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