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