can unriddle
Regular verb: unriddle - unriddled- unriddled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can unriddle
you can unriddle
he can unriddle
we can unriddle
you can unriddle
they can unriddle 	I can be unriddling
you can be unriddling
he can be unriddling
we can be unriddling
you can be unriddling
they can be unriddling	I can have unriddled
you can have unriddled
he can have unriddled
we can have unriddled
you can have unriddled
they can have unriddled	I can have been unriddling
you can have been unriddling
he can have been unriddling
we can have been unriddling
you can have been unriddling
they can have been unriddling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't unriddle
you can't unriddle
he can't unriddle
we can't unriddle
you can't unriddle
they can't unriddle 	I can't be unriddling
you can't be unriddling
he can't be unriddling
we can't be unriddling
you can't be unriddling
they can't be unriddling	I can't have unriddled
you can't have unriddled
he can't have unriddled
we can't have unriddled
you can't have unriddled
they can't have unriddled	I can't have been unriddling
you can't have been unriddling
he can't have been unriddling
we can't have been unriddling
you can't have been unriddling
they can't have been unriddling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I unriddle?
can you unriddle?
can he unriddle?
can we unriddle?
can you unriddle?
can they unriddle? 	can I be unriddling?
can you be unriddling?
can he be unriddling?
can we be unriddling?
can you be unriddling?
can they be unriddling? 	can I have unriddled?
can you have unriddled?
can he have unriddled?
can we have unriddled?
can you have unriddled?
can they have unriddled? 	can I have been unriddling?
can you have been unriddling?
can he have been unriddling?
can we have been unriddling?
can you have been unriddling?
can they have been unriddling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I unriddle?
can't you unriddle?
can't he unriddle?
can't we unriddle?
can't you unriddle?
can't they unriddle? 	can't I be unriddling?
can't you be unriddling?
can't he be unriddling?
can't we be unriddling?
can't you be unriddling?
can't they be unriddling? 	can't I have unriddled?
can't you have unriddled?
can't he have unriddled?
can't we have unriddled?
can't you have unriddled?
can't they have unriddled? 	can't I have been unriddling?
can't you have been unriddling?
can't he have been unriddling?
can't we have been unriddling?
can't you have been unriddling?
can't they have been unriddling?