| I | substantiate | 
|---|---|
| you | substantiate | 
| he/she/it | substantiates | 
| we | substantiate | 
| you | substantiate | 
| they | substantiate | 
| I | substantiated | 
|---|---|
| you | substantiated | 
| he/she/it | substantiated | 
| we | substantiated | 
| you | substantiated | 
| they | substantiated | 
| I | have | substantiated | 
|---|---|---|
| you | have | substantiated | 
| he/she/it | has | substantiated | 
| we | have | substantiated | 
| you | have | substantiated | 
| they | have | substantiated | 
| I | had | substantiated | 
|---|---|---|
| you | had | substantiated | 
| he/she/it | had | substantiated | 
| we | had | substantiated | 
| you | had | substantiated | 
| they | had | substantiated | 
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