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