could graph
Verbo regular: graph - graphed- graphed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could graph
you could graph
he could graph
we could graph
you could graph
they could graph 	I could be graphing
you could be graphing
he could be graphing
we could be graphing
you could be graphing
they could be graphing	I could have graphed
you could have graphed
he could have graphed
we could have graphed
you could have graphed
they could have graphed	I could have been graphing
you could have been graphing
he could have been graphing
we could have been graphing
you could have been graphing
they could have been graphing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't graph
you couldn't graph
he couldn't graph
we couldn't graph
you couldn't graph
they couldn't graph 	I couldn't be graphing
you couldn't be graphing
he couldn't be graphing
we couldn't be graphing
you couldn't be graphing
they couldn't be graphing	I couldn't have graphed
you couldn't have graphed
he couldn't have graphed
we couldn't have graphed
you couldn't have graphed
they couldn't have graphed	I couldn't have been graphing
you couldn't have been graphing
he couldn't have been graphing
we couldn't have been graphing
you couldn't have been graphing
they couldn't have been graphing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I graph?
could you graph?
could he graph?
could we graph?
could you graph?
could they graph? 	could I be graphing?
could you be graphing?
could he be graphing?
could we be graphing?
could you be graphing?
could they be graphing? 	could I have graphed?
could you have graphed?
could he have graphed?
could we have graphed?
could you have graphed?
could they have graphed? 	could I have been graphing?
could you have been graphing?
could he have been graphing?
could we have been graphing?
could you have been graphing?
could they have been graphing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I graph?
couldn't you graph?
couldn't he graph?
couldn't we graph?
couldn't you graph?
couldn't they graph? 	couldn't I be graphing?
couldn't you be graphing?
couldn't he be graphing?
couldn't we be graphing?
couldn't you be graphing?
couldn't they be graphing? 	couldn't I have graphed?
couldn't you have graphed?
couldn't he have graphed?
couldn't we have graphed?
couldn't you have graphed?
couldn't they have graphed? 	couldn't I have been graphing?
couldn't you have been graphing?
couldn't he have been graphing?
couldn't we have been graphing?
couldn't you have been graphing?
couldn't they have been graphing?