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Indicative

Present

I undergo
you undergo
she undergoes
we undergo
they undergo

Present perfect

I have undergone
you have undergone
she has undergone
we have undergone
they have undergone

Preterit

I underwent
you underwent
she underwent
we underwent
they underwent

Past perfect

I had undergone
you had undergone
she had undergone
we had undergone
they had undergone

Future

I will undergo
you will undergo
she will undergo
we will undergo
they will undergo

Future perfect

I will have undergone
you will have undergone
she will has undergone
we will have undergone
they will have undergone

Subjunctive

Present

I undergo
you undergo
she undergo
we undergo
they undergo

Present perfect

I have undergone
you have undergone
she have undergone
we have undergone
they have undergone

Preterit

I underwent
you underwent
she underwent
we underwent
they underwent

Present perfect

I had undergone
you had undergone
she had undergone
we had undergone
they had undergone

Conditional

Present

I would undergo
you would undergo
she would undergo
we would undergo
they would undergo

Perfect

I would have undergone
you would have undergone
she would have undergone
we would have undergone
they would have undergone

Imperative

Present

undergo!
let's undergo!

Participle

Present participle (Gerund)

undergoing

Past participle

undergone