can retrospect
Regular verb: retrospect - retrospected- retrospected

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can retrospect
you can retrospect
he can retrospect
we can retrospect
you can retrospect
they can retrospect 	I can be retrospecting
you can be retrospecting
he can be retrospecting
we can be retrospecting
you can be retrospecting
they can be retrospecting	I can have retrospected
you can have retrospected
he can have retrospected
we can have retrospected
you can have retrospected
they can have retrospected	I can have been retrospecting
you can have been retrospecting
he can have been retrospecting
we can have been retrospecting
you can have been retrospecting
they can have been retrospecting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't retrospect
you can't retrospect
he can't retrospect
we can't retrospect
you can't retrospect
they can't retrospect 	I can't be retrospecting
you can't be retrospecting
he can't be retrospecting
we can't be retrospecting
you can't be retrospecting
they can't be retrospecting	I can't have retrospected
you can't have retrospected
he can't have retrospected
we can't have retrospected
you can't have retrospected
they can't have retrospected	I can't have been retrospecting
you can't have been retrospecting
he can't have been retrospecting
we can't have been retrospecting
you can't have been retrospecting
they can't have been retrospecting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I retrospect?
can you retrospect?
can he retrospect?
can we retrospect?
can you retrospect?
can they retrospect? 	can I be retrospecting?
can you be retrospecting?
can he be retrospecting?
can we be retrospecting?
can you be retrospecting?
can they be retrospecting? 	can I have retrospected?
can you have retrospected?
can he have retrospected?
can we have retrospected?
can you have retrospected?
can they have retrospected? 	can I have been retrospecting?
can you have been retrospecting?
can he have been retrospecting?
can we have been retrospecting?
can you have been retrospecting?
can they have been retrospecting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I retrospect?
can't you retrospect?
can't he retrospect?
can't we retrospect?
can't you retrospect?
can't they retrospect? 	can't I be retrospecting?
can't you be retrospecting?
can't he be retrospecting?
can't we be retrospecting?
can't you be retrospecting?
can't they be retrospecting? 	can't I have retrospected?
can't you have retrospected?
can't he have retrospected?
can't we have retrospected?
can't you have retrospected?
can't they have retrospected? 	can't I have been retrospecting?
can't you have been retrospecting?
can't he have been retrospecting?
can't we have been retrospecting?
can't you have been retrospecting?
can't they have been retrospecting?