Verbs ending in a consonant followed by -y change the -y to -ied in the past tense form.
Skullduggery is regular. It follows the -ied Conversion rule.
Use past time markers: "Yesterday, she skullduggeried to the store."
No. Use "did not skullduggery" (not "did not skullduggeried").
The verb skullduggery follows the standard English past tense conjugation rule. When forming the past tense, skullduggery becomes skullduggeried. This follows the -ied Conversion pattern, which is one of the most common conjugation rules in English.
Understanding why skullduggery becomes skullduggeried helps with spelling and pronunciation. Verbs ending in a consonant followed by -y change the -y to -ied in the past tense form.
When using skullduggeried 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 skullduggeried to the store." The past tense form does not change based on the subject — I skullduggeried, you skullduggeried, he/she skullduggeried, we skullduggeried, they skullduggeried.