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