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