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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 up
you build up
he/she/it builds up
we build up
they build up
I have built up; builded up
you have built up; builded up
he/she/it has built up; builded up
we have built up; builded up
they have built up; builded up
I built up
you built up
he/she/it built up
we built up
they built up
I had built up; builded up
you had built up; builded up
he/she/it had built up; builded up
we had built up; builded up
they had built up; builded up
I will build up
you will build up
he/she/it will build up
we will build up
they will build up
I will have built up; builded up
you will have built up; builded up
he/she/it will have built up; builded up
we will have built up; builded up
they will have built up; builded up
I am building up
you are building up
he/she/it is building up
we are building up
they are building up
I have been building up
you have been building up
he/she/it has been building up
we have been building up
they have been building up
I was building up
you were building up
he/she/it was building up
we were building up
they were building up
I had been building up
you had been building up
he/she/it had been building up
we had been building up
they had been building up
I will be building up
you will be building up
he/she/it will be building up
we will be building up
they will be building up
I will have been building up
you will have been building up
he/she/it will have been building up
we will have been building up
they will have been building up

Subjunctive

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

Conditional

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

Imperative

you build up
we Let's build up

← Conjugate another English verb

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