could formulize
Regular verb: formulize - formulized- formulized

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could formulize
you could formulize
he could formulize
we could formulize
you could formulize
they could formulize 	I could be formulizing
you could be formulizing
he could be formulizing
we could be formulizing
you could be formulizing
they could be formulizing	I could have formulized
you could have formulized
he could have formulized
we could have formulized
you could have formulized
they could have formulized	I could have been formulizing
you could have been formulizing
he could have been formulizing
we could have been formulizing
you could have been formulizing
they could have been formulizing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't formulize
you couldn't formulize
he couldn't formulize
we couldn't formulize
you couldn't formulize
they couldn't formulize 	I couldn't be formulizing
you couldn't be formulizing
he couldn't be formulizing
we couldn't be formulizing
you couldn't be formulizing
they couldn't be formulizing	I couldn't have formulized
you couldn't have formulized
he couldn't have formulized
we couldn't have formulized
you couldn't have formulized
they couldn't have formulized	I couldn't have been formulizing
you couldn't have been formulizing
he couldn't have been formulizing
we couldn't have been formulizing
you couldn't have been formulizing
they couldn't have been formulizing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I formulize?
could you formulize?
could he formulize?
could we formulize?
could you formulize?
could they formulize? 	could I be formulizing?
could you be formulizing?
could he be formulizing?
could we be formulizing?
could you be formulizing?
could they be formulizing? 	could I have formulized?
could you have formulized?
could he have formulized?
could we have formulized?
could you have formulized?
could they have formulized? 	could I have been formulizing?
could you have been formulizing?
could he have been formulizing?
could we have been formulizing?
could you have been formulizing?
could they have been formulizing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I formulize?
couldn't you formulize?
couldn't he formulize?
couldn't we formulize?
couldn't you formulize?
couldn't they formulize? 	couldn't I be formulizing?
couldn't you be formulizing?
couldn't he be formulizing?
couldn't we be formulizing?
couldn't you be formulizing?
couldn't they be formulizing? 	couldn't I have formulized?
couldn't you have formulized?
couldn't he have formulized?
couldn't we have formulized?
couldn't you have formulized?
couldn't they have formulized? 	couldn't I have been formulizing?
couldn't you have been formulizing?
couldn't he have been formulizing?
couldn't we have been formulizing?
couldn't you have been formulizing?
couldn't they have been formulizing?