This verb follows the standard English past tense rule: simply add -ed to the base form.
Decolour is regular. It follows the Standard -ed rule.
Use past time markers: "Yesterday, she decoloured to the store."
No. Use "did not decolour" (not "did not decoloured").
The verb decolour follows the standard English past tense conjugation rule. When forming the past tense, decolour becomes decoloured. This follows the Standard -ed pattern, which is one of the most common conjugation rules in English.
Understanding why decolour becomes decoloured helps with spelling and pronunciation. This verb follows the standard English past tense rule: simply add -ed to the base form.
When using decoloured 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 decoloured to the store." The past tense form does not change based on the subject — I decoloured, you decoloured, he/she decoloured, we decoloured, they decoloured.