should riddle
Regular verb: riddle - riddled- riddled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'd riddle
you'd riddle
he'd riddle
we'd riddle
you'd riddle
they'd riddle 	I'd be riddling
you'd be riddling
he'd be riddling
we'd be riddling
you'd be riddling
they'd be riddling	I should've riddled
you should've riddled
he should've riddled
we should've riddled
you should've riddled
they should've riddled	I should've been riddling
you should've been riddling
he should've been riddling
we should've been riddling
you should've been riddling
they should've been riddling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shouldn't riddle
you shouldn't riddle
he shouldn't riddle
we shouldn't riddle
you shouldn't riddle
they shouldn't riddle 	I shouldn't be riddling
you shouldn't be riddling
he shouldn't be riddling
we shouldn't be riddling
you shouldn't be riddling
they shouldn't be riddling	I shouldn't have riddled
you shouldn't have riddled
he shouldn't have riddled
we shouldn't have riddled
you shouldn't have riddled
they shouldn't have riddled	I shouldn't have been riddling
you shouldn't have been riddling
he shouldn't have been riddling
we shouldn't have been riddling
you shouldn't have been riddling
they shouldn't have been riddling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
should I riddle?
should you riddle?
should he riddle?
should we riddle?
should you riddle?
should they riddle? 	should I be riddling?
should you be riddling?
should he be riddling?
should we be riddling?
should you be riddling?
should they be riddling? 	should I have riddled?
should you have riddled?
should he have riddled?
should we have riddled?
should you have riddled?
should they have riddled? 	should I have been riddling?
should you have been riddling?
should he have been riddling?
should we have been riddling?
should you have been riddling?
should they have been riddling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shouldn't I riddle?
shouldn't you riddle?
shouldn't he riddle?
shouldn't we riddle?
shouldn't you riddle?
shouldn't they riddle? 	shouldn't I be riddling?
shouldn't you be riddling?
shouldn't he be riddling?
shouldn't we be riddling?
shouldn't you be riddling?
shouldn't they be riddling? 	shouldn't I have riddled?
shouldn't you have riddled?
shouldn't he have riddled?
shouldn't we have riddled?
shouldn't you have riddled?
shouldn't they have riddled? 	shouldn't I have been riddling?
shouldn't you have been riddling?
shouldn't he have been riddling?
shouldn't we have been riddling?
shouldn't you have been riddling?
shouldn't they have been riddling?