English verb conjugation
COULD CORK

Regular verb: cork - corked - corked

Affirmation

Simple form	V-ing form
I could cork you could cork he could cork we could cork you could cork they could cork	I could be corking you could be corking he could be corking we could be corking you could be corking they could be corking
Perfect	V-ing perfect
I could have corked you could have corked he could have corked we could have corked you could have corked they could have corked	I could have been corking you could have been corking he could have been corking we could have been corking you could have been corking they could have been corking

Negation

Simple form	V-ing form
I could not cork you could not cork he could not cork we could not cork you could not cork they could not cork	I could not be corking you could not be corking he could not be corking we could not be corking you could not be corking they could not be corking
Perfect	V-ing perfect
I could not have corked you could not have corked he could not have corked we could not have corked you could not have corked they could not have corked	I could not have been corking you could not have been corking he could not have been corking we could not have been corking you could not have been corking they could not have been corking

Interrogative form

Simple form	V-ing form
could I cork? could you cork? could he cork? could we cork? could you cork? could they cork?	could I be corking? could you be corking? could he be corking? could we be corking? could you be corking? could they be corking?
Perfect	V-ing perfect
could I have corked? could you have corked? could he have corked? could we have corked? could you have corked? could they have corked?	could I have been corking? could you have been corking? could he have been corking? could we have been corking? could you have been corking? could they have been corking?

Interro-negative form

Simple form	V-ing form
could I not cork? could you not cork? could he not cork? could we not cork? could you not cork? could they not cork?	could I not be corking? could you not be corking? could he not be corking? could we not be corking? could you not be corking? could they not be corking?
Perfect	V-ing perfect
could I not have corked? could you not have corked? could he not have corked? could we not have corked? could you not have corked? could they not have corked?	could I not have been corking? could you not have been corking? could he not have been corking? could we not have been corking? could you not have been corking? could they not have been corking?