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