





- obligation to perform
-




I | perform |
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you | perform |
he/she/it | performs |
we | perform |
you | perform |
they | perform |
I | performed |
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you | performed |
he/she/it | performed |
we | performed |
you | performed |
they | performed |
I | have | performed |
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you | have | performed |
he/she/it | has | performed |
we | have | performed |
you | have | performed |
they | have | performed |
I | had | performed |
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you | had | performed |
he/she/it | had | performed |
we | had | performed |
you | had | performed |
they | had | performed |