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