would stem
Regular verb: stem - stemmed- stemmed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd stem
you'd stem
he'd stem
we'd stem
you'd stem
they'd stem 	I'd be stemming
you'd be stemming
he'd be stemming
we'd be stemming
you'd be stemming
they'd be stemming	I would've stemmed
you would've stemmed
he would've stemmed
we would've stemmed
you would've stemmed
they would've stemmed	I would've been stemming
you would've been stemming
he would've been stemming
we would've been stemming
you would've been stemming
they would've been stemming	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I wouldn't stem
you wouldn't stem
he wouldn't stem
we wouldn't stem
you wouldn't stem
they wouldn't stem 	I wouldn't be stemming
you wouldn't be stemming
he wouldn't be stemming
we wouldn't be stemming
you wouldn't be stemming
they wouldn't be stemming	I wouldn't have stemmed
you wouldn't have stemmed
he wouldn't have stemmed
we wouldn't have stemmed
you wouldn't have stemmed
they wouldn't have stemmed	I wouldn't have been stemming
you wouldn't have been stemming
he wouldn't have been stemming
we wouldn't have been stemming
you wouldn't have been stemming
they wouldn't have been stemming	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
would I stem?
would you stem?
would he stem?
would we stem?
would you stem?
would they stem? 	would I be stemming?
would you be stemming?
would he be stemming?
would we be stemming?
would you be stemming?
would they be stemming? 	would I have stemmed?
would you have stemmed?
would he have stemmed?
would we have stemmed?
would you have stemmed?
would they have stemmed? 	would I have been stemming?
would you have been stemming?
would he have been stemming?
would we have been stemming?
would you have been stemming?
would they have been stemming? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
wouldn't I stem?
wouldn't you stem?
wouldn't he stem?
wouldn't we stem?
wouldn't you stem?
wouldn't they stem? 	wouldn't I be stemming?
wouldn't you be stemming?
wouldn't he be stemming?
wouldn't we be stemming?
wouldn't you be stemming?
wouldn't they be stemming? 	wouldn't I have stemmed?
wouldn't you have stemmed?
wouldn't he have stemmed?
wouldn't we have stemmed?
wouldn't you have stemmed?
wouldn't they have stemmed? 	wouldn't I have been stemming?
wouldn't you have been stemming?
wouldn't he have been stemming?
wouldn't we have been stemming?
wouldn't you have been stemming?
wouldn't they have been stemming?