could form
Verbo regular: form - formed- formed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could form
you could form
he could form
we could form
you could form
they could form 	I could be forming
you could be forming
he could be forming
we could be forming
you could be forming
they could be forming	I could have formed
you could have formed
he could have formed
we could have formed
you could have formed
they could have formed	I could have been forming
you could have been forming
he could have been forming
we could have been forming
you could have been forming
they could have been forming	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't form
you couldn't form
he couldn't form
we couldn't form
you couldn't form
they couldn't form 	I couldn't be forming
you couldn't be forming
he couldn't be forming
we couldn't be forming
you couldn't be forming
they couldn't be forming	I couldn't have formed
you couldn't have formed
he couldn't have formed
we couldn't have formed
you couldn't have formed
they couldn't have formed	I couldn't have been forming
you couldn't have been forming
he couldn't have been forming
we couldn't have been forming
you couldn't have been forming
they couldn't have been forming	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I form?
could you form?
could he form?
could we form?
could you form?
could they form? 	could I be forming?
could you be forming?
could he be forming?
could we be forming?
could you be forming?
could they be forming? 	could I have formed?
could you have formed?
could he have formed?
could we have formed?
could you have formed?
could they have formed? 	could I have been forming?
could you have been forming?
could he have been forming?
could we have been forming?
could you have been forming?
could they have been forming? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I form?
couldn't you form?
couldn't he form?
couldn't we form?
couldn't you form?
couldn't they form? 	couldn't I be forming?
couldn't you be forming?
couldn't he be forming?
couldn't we be forming?
couldn't you be forming?
couldn't they be forming? 	couldn't I have formed?
couldn't you have formed?
couldn't he have formed?
couldn't we have formed?
couldn't you have formed?
couldn't they have formed? 	couldn't I have been forming?
couldn't you have been forming?
couldn't he have been forming?
couldn't we have been forming?
couldn't you have been forming?
couldn't they have been forming?