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