would prevent
Regular verb: prevent - prevented- prevented

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd prevent
you'd prevent
he'd prevent
we'd prevent
you'd prevent
they'd prevent 	I'd be preventing
you'd be preventing
he'd be preventing
we'd be preventing
you'd be preventing
they'd be preventing	I would've prevented
you would've prevented
he would've prevented
we would've prevented
you would've prevented
they would've prevented	I would've been preventing
you would've been preventing
he would've been preventing
we would've been preventing
you would've been preventing
they would've been preventing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I wouldn't prevent
you wouldn't prevent
he wouldn't prevent
we wouldn't prevent
you wouldn't prevent
they wouldn't prevent 	I wouldn't be preventing
you wouldn't be preventing
he wouldn't be preventing
we wouldn't be preventing
you wouldn't be preventing
they wouldn't be preventing	I wouldn't have prevented
you wouldn't have prevented
he wouldn't have prevented
we wouldn't have prevented
you wouldn't have prevented
they wouldn't have prevented	I wouldn't have been preventing
you wouldn't have been preventing
he wouldn't have been preventing
we wouldn't have been preventing
you wouldn't have been preventing
they wouldn't have been preventing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
would I prevent?
would you prevent?
would he prevent?
would we prevent?
would you prevent?
would they prevent? 	would I be preventing?
would you be preventing?
would he be preventing?
would we be preventing?
would you be preventing?
would they be preventing? 	would I have prevented?
would you have prevented?
would he have prevented?
would we have prevented?
would you have prevented?
would they have prevented? 	would I have been preventing?
would you have been preventing?
would he have been preventing?
would we have been preventing?
would you have been preventing?
would they have been preventing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
wouldn't I prevent?
wouldn't you prevent?
wouldn't he prevent?
wouldn't we prevent?
wouldn't you prevent?
wouldn't they prevent? 	wouldn't I be preventing?
wouldn't you be preventing?
wouldn't he be preventing?
wouldn't we be preventing?
wouldn't you be preventing?
wouldn't they be preventing? 	wouldn't I have prevented?
wouldn't you have prevented?
wouldn't he have prevented?
wouldn't we have prevented?
wouldn't you have prevented?
wouldn't they have prevented? 	wouldn't I have been preventing?
wouldn't you have been preventing?
wouldn't he have been preventing?
wouldn't we have been preventing?
wouldn't you have been preventing?
wouldn't they have been preventing?