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Indicative

Present Simple
Perfect Simple
Past Simple
Pluperfect Simple
Future Simple
Future perfect Simple
Present Continuous
Perfect Continuous
Past Continuous
Pluperfect Continuous
Future Continuous
Future perfect Continuous
I build upon
you build upon
he/she/it builds upon
we build upon
they build upon
I have built upon; builded upon
you have built upon; builded upon
he/she/it has built upon; builded upon
we have built upon; builded upon
they have built upon; builded upon
I built upon
you built upon
he/she/it built upon
we built upon
they built upon
I had built upon; builded upon
you had built upon; builded upon
he/she/it had built upon; builded upon
we had built upon; builded upon
they had built upon; builded upon
I will build upon
you will build upon
he/she/it will build upon
we will build upon
they will build upon
I will have built upon; builded upon
you will have built upon; builded upon
he/she/it will have built upon; builded upon
we will have built upon; builded upon
they will have built upon; builded upon
I am building upon
you are building upon
he/she/it is building upon
we are building upon
they are building upon
I have been building upon
you have been building upon
he/she/it has been building upon
we have been building upon
they have been building upon
I was building upon
you were building upon
he/she/it was building upon
we were building upon
they were building upon
I had been building upon
you had been building upon
he/she/it had been building upon
we had been building upon
they had been building upon
I will be building upon
you will be building upon
he/she/it will be building upon
we will be building upon
they will be building upon
I will have been building upon
you will have been building upon
he/she/it will have been building upon
we will have been building upon
they will have been building upon

Subjunctive

Present Simple
Perfect Simple
Imperfect Simple
Pluperfect Simple
I build upon
you build upon
he/she/it build upon
we build upon
they build upon
I have built upon; builded upon
you have built upon; builded upon
he/she/it have built upon; builded upon
we have built upon; builded upon
they have built upon; builded upon
I built upon
you built upon
he/she/it built upon
we built upon
they built upon
I had built upon; builded upon
you had built upon; builded upon
he/she/it had built upon; builded upon
we had built upon; builded upon
they had built upon; builded upon

Conditional

Present Simple
Perfect Simple
Present Continuous
Perfect Continuous
I would build upon
you would build upon
he/she/it would build upon
we would build upon
they would build upon
I would have built upon; builded upon
you would have built upon; builded upon
he/she/it would have built upon; builded upon
we would have built upon; builded upon
they would have built upon; builded upon
I would be building upon
you would be building upon
he/she/it would be building upon
we would be building upon
they would be building upon
I would have been building upon
you would have been building upon
he/she/it would have been building upon
we would have been building upon
they would have been building upon

Imperative

you build upon
we Let's build upon

← Conjugate another English verb

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