could formulise
Regular verb: formulise - formulised- formulised

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could formulise
you could formulise
he could formulise
we could formulise
you could formulise
they could formulise 	I could be formulising
you could be formulising
he could be formulising
we could be formulising
you could be formulising
they could be formulising	I could have formulised
you could have formulised
he could have formulised
we could have formulised
you could have formulised
they could have formulised	I could have been formulising
you could have been formulising
he could have been formulising
we could have been formulising
you could have been formulising
they could have been formulising	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't formulise
you couldn't formulise
he couldn't formulise
we couldn't formulise
you couldn't formulise
they couldn't formulise 	I couldn't be formulising
you couldn't be formulising
he couldn't be formulising
we couldn't be formulising
you couldn't be formulising
they couldn't be formulising	I couldn't have formulised
you couldn't have formulised
he couldn't have formulised
we couldn't have formulised
you couldn't have formulised
they couldn't have formulised	I couldn't have been formulising
you couldn't have been formulising
he couldn't have been formulising
we couldn't have been formulising
you couldn't have been formulising
they couldn't have been formulising	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I formulise?
could you formulise?
could he formulise?
could we formulise?
could you formulise?
could they formulise? 	could I be formulising?
could you be formulising?
could he be formulising?
could we be formulising?
could you be formulising?
could they be formulising? 	could I have formulised?
could you have formulised?
could he have formulised?
could we have formulised?
could you have formulised?
could they have formulised? 	could I have been formulising?
could you have been formulising?
could he have been formulising?
could we have been formulising?
could you have been formulising?
could they have been formulising? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I formulise?
couldn't you formulise?
couldn't he formulise?
couldn't we formulise?
couldn't you formulise?
couldn't they formulise? 	couldn't I be formulising?
couldn't you be formulising?
couldn't he be formulising?
couldn't we be formulising?
couldn't you be formulising?
couldn't they be formulising? 	couldn't I have formulised?
couldn't you have formulised?
couldn't he have formulised?
couldn't we have formulised?
couldn't you have formulised?
couldn't they have formulised? 	couldn't I have been formulising?
couldn't you have been formulising?
couldn't he have been formulising?
couldn't we have been formulising?
couldn't you have been formulising?
couldn't they have been formulising?