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