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