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