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