can fork
Verbo regular: fork - forked- forked

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

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

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

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