Conjugación del verbo inglés
COULD SCREW

Verbo regular: screw - screwed - screwed

Afirmación

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

Negación

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

Forma interrogativa

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

Forma interro-negativa

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