could fork
Verbo regular: fork - forked- forked

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I could fork
you could fork
he could fork
we could fork
you could fork
they could fork 	I could be forking
you could be forking
he could be forking
we could be forking
you could be forking
they could be forking	I could have forked
you could have forked
he could have forked
we could have forked
you could have forked
they could have forked	I could have been forking
you could have been forking
he could have been forking
we could have been forking
you could have been forking
they could have been forking	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I couldn't fork
you couldn't fork
he couldn't fork
we couldn't fork
you couldn't fork
they couldn't fork 	I couldn't be forking
you couldn't be forking
he couldn't be forking
we couldn't be forking
you couldn't be forking
they couldn't be forking	I couldn't have forked
you couldn't have forked
he couldn't have forked
we couldn't have forked
you couldn't have forked
they couldn't have forked	I couldn't have been forking
you couldn't have been forking
he couldn't have been forking
we couldn't have been forking
you couldn't have been forking
they couldn't have been forking	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
could I fork?
could you fork?
could he fork?
could we fork?
could you fork?
could they fork? 	could I be forking?
could you be forking?
could he be forking?
could we be forking?
could you be forking?
could they be forking? 	could I have forked?
could you have forked?
could he have forked?
could we have forked?
could you have forked?
could they have forked? 	could I have been forking?
could you have been forking?
could he have been forking?
could we have been forking?
could you have been forking?
could they have been forking? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
couldn't I fork?
couldn't you fork?
couldn't he fork?
couldn't we fork?
couldn't you fork?
couldn't they fork? 	couldn't I be forking?
couldn't you be forking?
couldn't he be forking?
couldn't we be forking?
couldn't you be forking?
couldn't they be forking? 	couldn't I have forked?
couldn't you have forked?
couldn't he have forked?
couldn't we have forked?
couldn't you have forked?
couldn't they have forked? 	couldn't I have been forking?
couldn't you have been forking?
couldn't he have been forking?
couldn't we have been forking?
couldn't you have been forking?
couldn't they have been forking?