can screw
Verbo regular: screw - screwed- screwed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I can screw
you can screw
she can screw
we can screw
you can screw
they can screw 	I can be screwing
you can be screwing
she can be screwing
we can be screwing
you can be screwing
they can be screwing	I can have screwed
you can have screwed
she can have screwed
we can have screwed
you can have screwed
they can have screwed	I can have been screwing
you can have been screwing
she can have been screwing
we can have been screwing
you can have been screwing
they can have been screwing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I cannot screw
you cannot screw
she cannot screw
we cannot screw
you cannot screw
they cannot screw 	I cannot be screwing
you cannot be screwing
she cannot be screwing
we cannot be screwing
you cannot be screwing
they cannot be screwing	I cannot have screwed
you cannot have screwed
she cannot have screwed
we cannot have screwed
you cannot have screwed
they cannot have screwed	I cannot have been screwing
you cannot have been screwing
she cannot have been screwing
we cannot have been screwing
you cannot have been screwing
they cannot have been screwing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I screw?
can you screw?
can she screw?
can we screw?
can you screw?
can they screw? 	can I be screwing?
can you be screwing?
can she be screwing?
can we be screwing?
can you be screwing?
can they be screwing? 	can I have screwed?
can you have screwed?
can she have screwed?
can we have screwed?
can you have screwed?
can they have screwed? 	can I have been screwing?
can you have been screwing?
can she have been screwing?
can we have been screwing?
can you have been screwing?
can they have been screwing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
can I not screw?
can you not screw?
can she not screw?
can we not screw?
can you not screw?
can they not screw? 	can I not be screwing?
can you not be screwing?
can she not be screwing?
can we not be screwing?
can you not be screwing?
can they not be screwing? 	can I not have screwed?
can you not have screwed?
can she not have screwed?
can we not have screwed?
can you not have screwed?
can they not have screwed? 	can I not have been screwing?
can you not have been screwing?
can she not have been screwing?
can we not have been screwing?
can you not have been screwing?
can they not have been screwing?