can foil
Verbo regular: foil - foiled- foiled

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can foil
you can foil
he can foil
we can foil
you can foil
they can foil 	I can be foiling
you can be foiling
he can be foiling
we can be foiling
you can be foiling
they can be foiling	I can have foiled
you can have foiled
he can have foiled
we can have foiled
you can have foiled
they can have foiled	I can have been foiling
you can have been foiling
he can have been foiling
we can have been foiling
you can have been foiling
they can have been foiling	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I cannot foil
you cannot foil
he cannot foil
we cannot foil
you cannot foil
they cannot foil 	I cannot be foiling
you cannot be foiling
he cannot be foiling
we cannot be foiling
you cannot be foiling
they cannot be foiling	I cannot have foiled
you cannot have foiled
he cannot have foiled
we cannot have foiled
you cannot have foiled
they cannot have foiled	I cannot have been foiling
you cannot have been foiling
he cannot have been foiling
we cannot have been foiling
you cannot have been foiling
they cannot have been foiling	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I foil?
can you foil?
can he foil?
can we foil?
can you foil?
can they foil? 	can I be foiling?
can you be foiling?
can he be foiling?
can we be foiling?
can you be foiling?
can they be foiling? 	can I have foiled?
can you have foiled?
can he have foiled?
can we have foiled?
can you have foiled?
can they have foiled? 	can I have been foiling?
can you have been foiling?
can he have been foiling?
can we have been foiling?
can you have been foiling?
can they have been foiling? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I not foil?
can you not foil?
can he not foil?
can we not foil?
can you not foil?
can they not foil? 	can I not be foiling?
can you not be foiling?
can he not be foiling?
can we not be foiling?
can you not be foiling?
can they not be foiling? 	can I not have foiled?
can you not have foiled?
can he not have foiled?
can we not have foiled?
can you not have foiled?
can they not have foiled? 	can I not have been foiling?
can you not have been foiling?
can he not have been foiling?
can we not have been foiling?
can you not have been foiling?
can they not have been foiling?