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