Conjugation of to sustain

All tenses of the English verb, with every person.

to sustain
To maintain, or keep in existence.
regular verb
Infinitivesustain
Past simplesustained
Past participlesustained
-ing formsustaining
Full conjugation of the English verb to sustain (past simple sustained, past participle sustained): present simple and continuous, past simple and continuous, present perfect, past perfect, future, conditional, subjunctive and imperative, with all persons.

Indicative

Present simple

I sustain
you sustain
he/she/it sustains
we sustain
you sustain
they sustain

Present continuous

I am sustaining
you are sustaining
he/she/it is sustaining
we are sustaining
you are sustaining
they are sustaining

Present perfect

I have sustained
you have sustained
he/she/it has sustained
we have sustained
you have sustained
they have sustained

Present perfect continuous

I have been sustaining
you have been sustaining
he/she/it has been sustaining
we have been sustaining
you have been sustaining
they have been sustaining

Past simple

I sustained
you sustained
he/she/it sustained
we sustained
you sustained
they sustained

Past continuous

I was sustaining
you were sustaining
he/she/it was sustaining
we were sustaining
you were sustaining
they were sustaining

Past perfect

I had sustained
you had sustained
he/she/it had sustained
we had sustained
you had sustained
they had sustained

Past perfect continuous

I had been sustaining
you had been sustaining
he/she/it had been sustaining
we had been sustaining
you had been sustaining
they had been sustaining

Future simple

I will sustain
you will sustain
he/she/it will sustain
we will sustain
you will sustain
they will sustain

Future continuous

I will be sustaining
you will be sustaining
he/she/it will be sustaining
we will be sustaining
you will be sustaining
they will be sustaining

Future perfect

I will have sustained
you will have sustained
he/she/it will have sustained
we will have sustained
you will have sustained
they will have sustained

Future perfect continuous

I will have been sustaining
you will have been sustaining
he/she/it will have been sustaining
we will have been sustaining
you will have been sustaining
they will have been sustaining

Conditional

Present

I would sustain
you would sustain
he/she/it would sustain
we would sustain
you would sustain
they would sustain

Present continuous

I would be sustaining
you would be sustaining
he/she/it would be sustaining
we would be sustaining
you would be sustaining
they would be sustaining

Perfect

I would have sustained
you would have sustained
he/she/it would have sustained
we would have sustained
you would have sustained
they would have sustained

Perfect continuous

I would have been sustaining
you would have been sustaining
he/she/it would have been sustaining
we would have been sustaining
you would have been sustaining
they would have been sustaining

Subjunctive

Present

that I sustain
that you sustain
that he/she/it sustain
that we sustain
that you sustain
that they sustain

Past

if I sustained
if you sustained
if he/she/it sustained
if we sustained
if you sustained
if they sustained

Imperative

Affirmative

you sustain
we let's sustain

Negative

you don't sustain
we let's not sustain

Non-finite forms

Infinitive

to sustain

Perfect infinitive

to have sustained

Present participle / gerund

sustaining

Past participle

sustained

Conjugations: Wiktionary (via kaikki.org), adapted, licensed under CC BY-SA 4.0.