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