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