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