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