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