English verb conjugation
COULD SILK

Regular verb: silk - silked - silked

Affirmation

Simple form	V-ing form
I could silk you could silk he could silk we could silk you could silk they could silk	I could be silking you could be silking he could be silking we could be silking you could be silking they could be silking
Perfect	V-ing perfect
I could have silked you could have silked he could have silked we could have silked you could have silked they could have silked	I could have been silking you could have been silking he could have been silking we could have been silking you could have been silking they could have been silking

Negation

Simple form	V-ing form
I could not silk you could not silk he could not silk we could not silk you could not silk they could not silk	I could not be silking you could not be silking he could not be silking we could not be silking you could not be silking they could not be silking
Perfect	V-ing perfect
I could not have silked you could not have silked he could not have silked we could not have silked you could not have silked they could not have silked	I could not have been silking you could not have been silking he could not have been silking we could not have been silking you could not have been silking they could not have been silking

Interrogative form

Simple form	V-ing form
could I silk? could you silk? could he silk? could we silk? could you silk? could they silk?	could I be silking? could you be silking? could he be silking? could we be silking? could you be silking? could they be silking?
Perfect	V-ing perfect
could I have silked? could you have silked? could he have silked? could we have silked? could you have silked? could they have silked?	could I have been silking? could you have been silking? could he have been silking? could we have been silking? could you have been silking? could they have been silking?

Interro-negative form

Simple form	V-ing form
could I not silk? could you not silk? could he not silk? could we not silk? could you not silk? could they not silk?	could I not be silking? could you not be silking? could he not be silking? could we not be silking? could you not be silking? could they not be silking?
Perfect	V-ing perfect
could I not have silked? could you not have silked? could he not have silked? could we not have silked? could you not have silked? could they not have silked?	could I not have been silking? could you not have been silking? could he not have been silking? could we not have been silking? could you not have been silking? could they not have been silking?