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