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