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