English verb conjugation TO STIFFEN

Regular verb: stiffen - stiffened - stiffened

Indicative

Present

I stiffen
you stiffen
he stiffens
we stiffen
you stiffen
they stiffen

Present continuous

I'm stiffening
you're stiffening
he's stiffening
we're stiffening
you're stiffening
they're stiffening

Preterite

I stiffened
you stiffened
he stiffened
we stiffened
you stiffened
they stiffened

Preterite continuous

I was stiffening
you were stiffening
he was stiffening
we were stiffening
you were stiffening
they were stiffening

Present perfect

I've stiffened
you've stiffened
he's stiffened
we've stiffened
you've stiffened
they've stiffened

Present perfect continuous

I've been stiffening
you've been stiffening
he's been stiffening
we've been stiffening
you've been stiffening
they've been stiffening

Pluperfect

I'd stiffened
you'd stiffened
he'd stiffened
we'd stiffened
you'd stiffened
they'd stiffened

Pluperfect continuous

I'd been stiffening
you'd been stiffening
he'd been stiffening
we'd been stiffening
you'd been stiffening
they'd been stiffening

Future

I'll stiffen
you'll stiffen
he'll stiffen
we'll stiffen
you'll stiffen
they'll stiffen

Future continuous

I'll be stiffening
you'll be stiffening
he'll be stiffening
we'll be stiffening
you'll be stiffening
they'll be stiffening

Future perfect

I'll have stiffened
you'll have stiffened
he'll have stiffened
we'll have stiffened
you'll have stiffened
they'll have stiffened

Future perfect continuous

I'll have been stiffening
you'll have been stiffening
he'll have been stiffening
we'll have been stiffening
you'll have been stiffening
they'll have been stiffening

Conditional

Present

I'd stiffen
you'd stiffen
he'd stiffen
we'd stiffen
you'd stiffen
they'd stiffen

Present continuous

I'd be stiffening
you'd be stiffening
he'd be stiffening
we'd be stiffening
you'd be stiffening
they'd be stiffening

Past

I'd have stiffened
you'd have stiffened
he'd have stiffened
we'd have stiffened
you'd have stiffened
they'd have stiffened

Past continuous

I'd have been stiffening
you'd have been stiffening
he'd have been stiffening
we'd have been stiffening
you'd have been stiffening
they'd have been stiffening

Imperative

stiffen
Let's stiffen
stiffen

Infinitive

to stiffen

Participle

Present

stiffening

Past

stiffened

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