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