could riddle
Verbo regular: riddle - riddled- riddled

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could riddle
you could riddle
he could riddle
we could riddle
you could riddle
they could riddle 	I could be riddling
you could be riddling
he could be riddling
we could be riddling
you could be riddling
they could be riddling	I could have riddled
you could have riddled
he could have riddled
we could have riddled
you could have riddled
they could have riddled	I could have been riddling
you could have been riddling
he could have been riddling
we could have been riddling
you could have been riddling
they could have been riddling	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't riddle
you couldn't riddle
he couldn't riddle
we couldn't riddle
you couldn't riddle
they couldn't riddle 	I couldn't be riddling
you couldn't be riddling
he couldn't be riddling
we couldn't be riddling
you couldn't be riddling
they couldn't be riddling	I couldn't have riddled
you couldn't have riddled
he couldn't have riddled
we couldn't have riddled
you couldn't have riddled
they couldn't have riddled	I couldn't have been riddling
you couldn't have been riddling
he couldn't have been riddling
we couldn't have been riddling
you couldn't have been riddling
they couldn't have been riddling	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I riddle?
could you riddle?
could he riddle?
could we riddle?
could you riddle?
could they riddle? 	could I be riddling?
could you be riddling?
could he be riddling?
could we be riddling?
could you be riddling?
could they be riddling? 	could I have riddled?
could you have riddled?
could he have riddled?
could we have riddled?
could you have riddled?
could they have riddled? 	could I have been riddling?
could you have been riddling?
could he have been riddling?
could we have been riddling?
could you have been riddling?
could they have been riddling? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I riddle?
couldn't you riddle?
couldn't he riddle?
couldn't we riddle?
couldn't you riddle?
couldn't they riddle? 	couldn't I be riddling?
couldn't you be riddling?
couldn't he be riddling?
couldn't we be riddling?
couldn't you be riddling?
couldn't they be riddling? 	couldn't I have riddled?
couldn't you have riddled?
couldn't he have riddled?
couldn't we have riddled?
couldn't you have riddled?
couldn't they have riddled? 	couldn't I have been riddling?
couldn't you have been riddling?
couldn't he have been riddling?
couldn't we have been riddling?
couldn't you have been riddling?
couldn't they have been riddling?