| I | certify |
| you | certify |
| he/she/it | certifies |
| we | certify |
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| you | have certified |
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| you | certified |
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| I | had certified |
| you | had certified |
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| you | will certify |
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| you | will certify |
| they | will certify |
| I | will have certified |
| you | will have certified |
| he/she/it | will have certified |
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| I | am certifying |
| you | are certifying |
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| you | had been certifying |
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| he/she/it | will have been certifying |
| we | will have been certifying |
| you | will have been certifying |
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| we | would be certifying |
| you | would be certifying |
| they | would be certifying |
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| you | would have been certifying |
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| you | would have been certifying |
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| we | Let's certify |
| You | certify |