Conjugation
stiffen
Language
English
IndicativePresent
- I stiffen
- you stiffen
- you stiffen
- he/she/it stiffens
- we stiffen
- they stiffen
IndicativePreterite
- I stiffened
- you stiffened
- you stiffened
- he/she/it stiffened
- we stiffened
- they stiffened
IndicativePresent continuous
- I am stiffening
- you are stiffening
- you are stiffening
- he/she/it is stiffening
- we are stiffening
- they are stiffening
IndicativePresent perfect
- I have stiffened
- you have stiffened
- you have stiffened
- he/she/it has stiffened
- we have stiffened
- they have stiffened
IndicativeFuture
- I will stiffen
- you will stiffen
- you will stiffen
- he/she/it will stiffen
- we will stiffen
- they will stiffen
IndicativeFuture perfect
- I will have stiffened
- you will have stiffened
- you will have stiffened
- he/she/it will have stiffened
- we will have stiffened
- they will have stiffened
IndicativePast continous
- I was stiffening
- you were stiffening
- you were stiffening
- he/she/it was stiffening
- we were stiffening
- they were stiffening
IndicativePast perfect
- I had stiffened
- you had stiffened
- you had stiffened
- he/she/it had stiffened
- we had stiffened
- they had stiffened
IndicativeFuture continuous
- I will be stiffening
- you will be stiffening
- you will be stiffening
- he/she/it will be stiffening
- we will be stiffening
- they will be stiffening
IndicativePresent perfect continuous
- I have been stiffening
- you have been stiffening
- you have been stiffening
- he/she/it has been stiffening
- we have been stiffening
- they have been stiffening
IndicativePast perfect continuous
- I had been stiffening
- you had been stiffening
- you had been stiffening
- he/she/it had been stiffening
- we had been stiffening
- they had been stiffening
IndicativeFuture perfect continuous
- I will have been stiffening
- you will have been stiffening
- you will have been stiffening
- he/she/it will have been stiffening
- we will have been stiffening
- they will have been stiffening
ParticiplePresent
- stiffening
ParticiplePast
- stiffened
Perfect participle
- having stiffened
Examples
Lift your neck a little and also stiffen your stomach muscles.
One or more horizontal reinforcing rings or vertical girts are required to stiffen the sidewalls.