to stiffen
Regular verb: stiffen - stiffened- stiffened

Indicative 	
Present 	Present continuous 	Preterite 	Preterite continuous 	
 don't I stiffen?
don't you stiffen?
doesn't he stiffen?
don't we stiffen?
don't you stiffen?
don't they stiffen? 	amI not stiffening?
aren't you stiffening?
isn't he stiffening?
aren't we stiffening?
aren't you stiffening?
aren't they stiffening? 	didn't I stiffen?
didn't you stiffen?
didn't he stiffen?
didn't we stiffen?
didn't you stiffen?
didn't they stiffen? 	wasn't I stiffening?
weren't you stiffening?
wasn't he stiffening?
weren't we stiffening?
weren't you stiffening?
weren't they stiffening? 	
Present perfect 	Present perfect continuous 	Pluperfect 	Pluperfect continuous 	
haven't I stiffened?
haven't you stiffened?
hasn't he stiffened?
haven't we stiffened?
haven't you stiffened?
haven't they stiffened? 	haven't I been stiffening?
haven't you been stiffening?
hasn't he been stiffening?
haven't we been stiffening?
haven't you been stiffening?
haven't they been stiffening? 	hadn't I stiffened?
hadn't you stiffened?
hadn't he stiffened?
hadn't we stiffened?
hadn't you stiffened?
hadn't they stiffened? 	hadn't I been stiffening?
hadn't you been stiffening?
hadn't he been stiffening?
hadn't we been stiffening?
hadn't you been stiffening?
hadn't they been stiffening? 	
Future 	Future continuous 	Future perfect 	Future perfect continuous 	
won't I stiffen?
won't you stiffen?
won't he stiffen?
won't we stiffen?
won't you stiffen?
won't they stiffen? 	won't I be stiffening?
won't you be stiffening?
won't he be stiffening?
won't we be stiffening?
won't you be stiffening?
won't they be stiffening? 	won't I have stiffened?
won't you have stiffened?
won't he have stiffened?
won't we have stiffened?
won't you have stiffened?
won't they have stiffened? 	won't I have been stiffening?
won't you have been stiffening?
won't he have been stiffening?
won't we have been stiffening?
won't you have been stiffening?
won't they have been stiffening? 	

Conditional 	
Present 	Present continuous 	Past 	Past continuous 	
wouldn't I stiffen?
wouldn't you stiffen?
wouldn't he stiffen?
wouldn't we stiffen?
wouldn't you stiffen?
wouldn't they stiffen? 	wouldn't I be stiffening?
wouldn't you be stiffening?
wouldn't he be stiffening?
wouldn't we be stiffening?
wouldn't you be stiffening?
wouldn't they be stiffening? 	wouldn't I have stiffened?
wouldn't you have stiffened?
wouldn't he have stiffened?
wouldn't we have stiffened?
wouldn't you have stiffened?
wouldn't they have stiffened? 	wouldn't I have been stiffening?
wouldn't you have been stiffening?
wouldn't he have been stiffening?
wouldn't we have been stiffening?
wouldn't you have been stiffening?
wouldn't they have been stiffening? 	

Infinitive 	
Imperative 	
Infinitive 	 	Imperative 	 	
to stiffen 	 	-
-
- 	 	

Participle 	
Present 	Past 	 	 	
stiffening	stiffened