Indicative
Present Indefinite
I stiffen
you stiffen
he/she/it stiffens
we stiffen
you stiffen
they stiffen
Present Continuous
I am stiffening
you are stiffening
he/she/it is stiffening
we are stiffening
you are stiffening
they are stiffening
Present Perfect
I have stiffened
you have stiffened
he/she/it has stiffened
we have stiffened
you have stiffened
they have stiffened
Present Perfect Continuous
I have been stiffening
you have been stiffening
he/she/it has been stiffening
we have been stiffening
you have been stiffening
they have been stiffening
Past Indefinite
I stiffened
you stiffened
he/she/it stiffened
we stiffened
you stiffened
they stiffened
Past Continuous
I was stiffening
you were stiffening
he/she/it was stiffening
we were stiffening
you were stiffening
they were stiffening
Past Perfect
I had stiffened
you had stiffened
he/she/it had stiffened
we had stiffened
you had stiffened
they had stiffened
Past Perfect Continuous
I had been stiffening
you had been stiffening
he/she/it had been stiffening
we had been stiffening
you had been stiffening
they had been stiffening
Future Indefinite
I will stiffen
you will stiffen
he/she/it will stiffen
we will stiffen
you will stiffen
they will stiffen
Future Continuous
I will be stiffening
you will be stiffening
he/she/it will be stiffening
we will be stiffening
you will be stiffening
they will be stiffening
Future Perfect
I will have stiffened
you will have stiffened
he/she/it will have stiffened
we will have stiffened
you will have stiffened
they will have stiffened
Future Perfect Continuous
I will have been stiffening
you will have been stiffening
he/she/it will have been stiffening
we will have been stiffening
you will have been stiffening
they will have been stiffening
Conditional
Conditional Present
I would stiffen
you would stiffen
he/she/it would stiffen
we would stiffen
you would stiffen
they would stiffen
Conditional Present Continuous
I would be stiffening
you would be stiffening
he/she/it would be stiffening
we would be stiffening
you would be stiffening
they would be stiffening
Conditional Perfect
I would have stiffened
you would have stiffened
he/she/it would have stiffened
we would have stiffened
you would have stiffened
they would have stiffened
Conditional Perfect Continuous
I would have been stiffening
you would have been stiffening
he/she/it would have been stiffening
we would have been stiffening
you would have been stiffening
they would have been stiffening
