Conjugate verb "stiffen" in English
Conjugation of the verb stiffen[ˈstɪfn],
regular 
Indicative
Present Indefinite
Present Continuous
Present Perfect
Present Perfect Continuous
Past Indefinite
Past Continuous
Past Perfect
Past Perfect Continuous
Future Indefinite
Future Continuous
Future Perfect
Future Perfect Continuous
Indicative
Present Indefinite
I don't stiffenyou don't stiffen
he/she/it doesn't stiffen
we don't stiffen
you don't stiffen
they don't stiffen
Present Continuous
I am not stiffeningyou aren't stiffening
he/she/it isn't stiffening
we aren't stiffening
you aren't stiffening
they aren't stiffening
Present Perfect
I haven't stiffenedyou haven't stiffened
he/she/it hasn't stiffened
we haven't stiffened
you haven't stiffened
they haven't stiffened
Present Perfect Continuous
I haven't been stiffeningyou haven't been stiffening
he/she/it hasn't been stiffening
we haven't been stiffening
you haven't been stiffening
they haven't been stiffening
Past Indefinite
I didn't stiffenyou didn't stiffen
he/she/it didn't stiffen
we didn't stiffen
you didn't stiffen
they didn't stiffen
Past Continuous
I wasn't stiffeningyou weren't stiffening
he/she/it wasn't stiffening
we weren't stiffening
you weren't stiffening
they weren't stiffening
Past Perfect
I hadn't stiffenedyou hadn't stiffened
he/she/it hadn't stiffened
we hadn't stiffened
you hadn't stiffened
they hadn't stiffened
Past Perfect Continuous
I hadn't been stiffeningyou hadn't been stiffening
he/she/it hadn't been stiffening
we hadn't been stiffening
you hadn't been stiffening
they hadn't been stiffening
Future Indefinite
I shan't / won't stiffenyou won't stiffen
he/she/it won't stiffen
we shan't / won't stiffen
you won't stiffen
they won't stiffen
Future Continuous
I shan't / won't be stiffeningyou won't be stiffening
he/she/it won't be stiffening
we shan't / won't be stiffening
you won't be stiffening
they won't be stiffening
Future Perfect
I shan't / won't have stiffenedyou won't have stiffened
he/she/it won't have stiffened
we shan't / won't have stiffened
you won't have stiffened
they won't have stiffened
Future Perfect Continuous
I shan't / won't have been stiffeningyou won't have been stiffening
he/she/it won't have been stiffening
we shan't / won't have been stiffening
you won't have been stiffening
they won't have been stiffening
Conditional
Conditional Present
Conditional Present Continuous
Conditional Perfect
Conditional Perfect Continuous
Conditional
Conditional Present
I wouldn't stiffenyou wouldn't stiffen
he/she/it wouldn't stiffen
we wouldn't stiffen
you wouldn't stiffen
they wouldn't stiffen
Conditional Present Continuous
I wouldn't be stiffeningyou wouldn't be stiffening
he/she/it wouldn't be stiffening
we wouldn't be stiffening
you wouldn't be stiffening
they wouldn't be stiffening
Conditional Perfect
I wouldn't have stiffenedyou wouldn't have stiffened
he/she/it wouldn't have stiffened
we wouldn't have stiffened
you wouldn't have stiffened
they wouldn't have stiffened
Conditional Perfect Continuous
I wouldn't have been stiffeningyou wouldn't have been stiffening
he/she/it wouldn't have been stiffening
we wouldn't have been stiffening
you wouldn't have been stiffening
they wouldn't have been stiffening
Participles
Present
Past
Infinitives
Infinitives
Popular English Verbs
Conjugation of English verbs
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