can screw
Regular verb: screw - screwed- screwed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't screw
you can't screw
she can't screw
we can't screw
you can't screw
they can't screw 	I can't be screwing
you can't be screwing
she can't be screwing
we can't be screwing
you can't be screwing
they can't be screwing	I can't have screwed
you can't have screwed
she can't have screwed
we can't have screwed
you can't have screwed
they can't have screwed	I can't have been screwing
you can't have been screwing
she can't have been screwing
we can't have been screwing
you can't have been screwing
they can't have been screwing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I screw?
can't you screw?
can't she screw?
can't we screw?
can't you screw?
can't they screw? 	can't I be screwing?
can't you be screwing?
can't she be screwing?
can't we be screwing?
can't you be screwing?
can't they be screwing? 	can't I have screwed?
can't you have screwed?
can't she have screwed?
can't we have screwed?
can't you have screwed?
can't they have screwed? 	can't I have been screwing?
can't you have been screwing?
can't she have been screwing?
can't we have been screwing?
can't you have been screwing?
can't they have been screwing?