could conceptualize
Regular verb: conceptualize - conceptualized- conceptualized

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could conceptualize
you could conceptualize
he could conceptualize
we could conceptualize
you could conceptualize
they could conceptualize 	I could be conceptualizing
you could be conceptualizing
he could be conceptualizing
we could be conceptualizing
you could be conceptualizing
they could be conceptualizing	I could have conceptualized
you could have conceptualized
he could have conceptualized
we could have conceptualized
you could have conceptualized
they could have conceptualized	I could have been conceptualizing
you could have been conceptualizing
he could have been conceptualizing
we could have been conceptualizing
you could have been conceptualizing
they could have been conceptualizing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't conceptualize
you couldn't conceptualize
he couldn't conceptualize
we couldn't conceptualize
you couldn't conceptualize
they couldn't conceptualize 	I couldn't be conceptualizing
you couldn't be conceptualizing
he couldn't be conceptualizing
we couldn't be conceptualizing
you couldn't be conceptualizing
they couldn't be conceptualizing	I couldn't have conceptualized
you couldn't have conceptualized
he couldn't have conceptualized
we couldn't have conceptualized
you couldn't have conceptualized
they couldn't have conceptualized	I couldn't have been conceptualizing
you couldn't have been conceptualizing
he couldn't have been conceptualizing
we couldn't have been conceptualizing
you couldn't have been conceptualizing
they couldn't have been conceptualizing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I conceptualize?
could you conceptualize?
could he conceptualize?
could we conceptualize?
could you conceptualize?
could they conceptualize? 	could I be conceptualizing?
could you be conceptualizing?
could he be conceptualizing?
could we be conceptualizing?
could you be conceptualizing?
could they be conceptualizing? 	could I have conceptualized?
could you have conceptualized?
could he have conceptualized?
could we have conceptualized?
could you have conceptualized?
could they have conceptualized? 	could I have been conceptualizing?
could you have been conceptualizing?
could he have been conceptualizing?
could we have been conceptualizing?
could you have been conceptualizing?
could they have been conceptualizing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I conceptualize?
couldn't you conceptualize?
couldn't he conceptualize?
couldn't we conceptualize?
couldn't you conceptualize?
couldn't they conceptualize? 	couldn't I be conceptualizing?
couldn't you be conceptualizing?
couldn't he be conceptualizing?
couldn't we be conceptualizing?
couldn't you be conceptualizing?
couldn't they be conceptualizing? 	couldn't I have conceptualized?
couldn't you have conceptualized?
couldn't he have conceptualized?
couldn't we have conceptualized?
couldn't you have conceptualized?
couldn't they have conceptualized? 	couldn't I have been conceptualizing?
couldn't you have been conceptualizing?
couldn't he have been conceptualizing?
couldn't we have been conceptualizing?
couldn't you have been conceptualizing?
couldn't they have been conceptualizing?