to stiffen
Regular verb: stiffen - stiffened- stiffened

Indicative 	
Present 	Present continuous 	Preterite 	Preterite continuous 	
 do I stiffen?
do you stiffen?
doeshe stiffen?
do we stiffen?
do you stiffen?
do they stiffen? 	amI stiffening?
areyou stiffening?
ishe stiffening?
arewe stiffening?
areyou stiffening?
arethey stiffening? 	did I stiffen?
did you stiffen?
did he stiffen?
did we stiffen?
did you stiffen?
did they stiffen? 	wasI stiffening?
wereyou stiffening?
washe stiffening?
werewe stiffening?
wereyou stiffening?
werethey stiffening? 	
Present perfect 	Present perfect continuous 	Pluperfect 	Pluperfect continuous 	
 have I stiffened?
have you stiffened?
hashe stiffened?
have we stiffened?
have you stiffened?
have they stiffened? 	 have I been stiffening?
have you been stiffening?
hashe been stiffening?
have we been stiffening?
have you been stiffening?
have they been stiffening? 	had I stiffened?
had you stiffened?
had he stiffened?
had we stiffened?
had you stiffened?
had they stiffened? 	had I been stiffening?
had you been stiffening?
had he been stiffening?
had we been stiffening?
had you been stiffening?
had they been stiffening? 	
Future 	Future continuous 	Future perfect 	Future perfect continuous 	
 will I stiffen?
 will you stiffen?
 will he stiffen?
 will we stiffen?
 will you stiffen?
 will they stiffen? 	 will I be stiffening?
 will you be stiffening?
 will he be stiffening?
 will we be stiffening?
 will you be stiffening?
 will they be stiffening? 	 will I have stiffened?
 will you have stiffened?
 will he have stiffened?
 will we have stiffened?
 will you have stiffened?
 will they have stiffened? 	 will I have been stiffening?
 will you have been stiffening?
 will he have been stiffening?
 will we have been stiffening?
 will you have been stiffening?
 will they have been stiffening? 	

Conditional 	
Present 	Present continuous 	Past 	Past continuous 	
 would I stiffen?
 would you stiffen?
 would he stiffen?
 would we stiffen?
 would you stiffen?
 would they stiffen? 	 would I be stiffening?
 would you be stiffening?
 would he be stiffening?
 would we be stiffening?
 would you be stiffening?
 would they be stiffening? 	 would I have stiffened?
 would you have stiffened?
 would he have stiffened?
 would we have stiffened?
 would you have stiffened?
 would they have stiffened? 	 would I have been stiffening?
 would you have been stiffening?
 would he have been stiffening?
 would we have been stiffening?
 would you have been stiffening?
 would they have been stiffening? 	

Infinitive 	
Imperative 	
Infinitive 	 	Imperative 	 	
to stiffen 	 	-
-
- 	 	

Participle 	
Present 	Past 	 	 	
stiffening	stiffened