could produce
Regular verb: produce - produced- produced

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could produce
you could produce
she could produce
we could produce
you could produce
they could produce 	I could be producing
you could be producing
she could be producing
we could be producing
you could be producing
they could be producing	I could have produced
you could have produced
she could have produced
we could have produced
you could have produced
they could have produced	I could have been producing
you could have been producing
she could have been producing
we could have been producing
you could have been producing
they could have been producing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't produce
you couldn't produce
she couldn't produce
we couldn't produce
you couldn't produce
they couldn't produce 	I couldn't be producing
you couldn't be producing
she couldn't be producing
we couldn't be producing
you couldn't be producing
they couldn't be producing	I couldn't have produced
you couldn't have produced
she couldn't have produced
we couldn't have produced
you couldn't have produced
they couldn't have produced	I couldn't have been producing
you couldn't have been producing
she couldn't have been producing
we couldn't have been producing
you couldn't have been producing
they couldn't have been producing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I produce?
could you produce?
could she produce?
could we produce?
could you produce?
could they produce? 	could I be producing?
could you be producing?
could she be producing?
could we be producing?
could you be producing?
could they be producing? 	could I have produced?
could you have produced?
could she have produced?
could we have produced?
could you have produced?
could they have produced? 	could I have been producing?
could you have been producing?
could she have been producing?
could we have been producing?
could you have been producing?
could they have been producing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I produce?
couldn't you produce?
couldn't she produce?
couldn't we produce?
couldn't you produce?
couldn't they produce? 	couldn't I be producing?
couldn't you be producing?
couldn't she be producing?
couldn't we be producing?
couldn't you be producing?
couldn't they be producing? 	couldn't I have produced?
couldn't you have produced?
couldn't she have produced?
couldn't we have produced?
couldn't you have produced?
couldn't they have produced? 	couldn't I have been producing?
couldn't you have been producing?
couldn't she have been producing?
couldn't we have been producing?
couldn't you have been producing?
couldn't they have been producing?