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 couldn't cork you couldn't cork he couldn't cork we couldn't cork you couldn't cork they couldn't cork	I couldn't be corking you couldn't be corking he couldn't be corking we couldn't be corking you couldn't be corking they couldn't be corking
Perfect	V-ing perfect
I couldn't have corked you couldn't have corked he couldn't have corked we couldn't have corked you couldn't have corked they couldn't have corked	I couldn't have been corking you couldn't have been corking he couldn't have been corking we couldn't have been corking you couldn't have been corking they couldn't 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
couldn't I cork? couldn't you cork? couldn't he cork? couldn't we cork? couldn't you cork? couldn't they cork?	couldn't I be corking? couldn't you be corking? couldn't he be corking? couldn't we be corking? couldn't you be corking? couldn't they be corking?
Perfect	V-ing perfect
couldn't I have corked? couldn't you have corked? couldn't he have corked? couldn't we have corked? couldn't you have corked? couldn't they have corked?	couldn't I have been corking? couldn't you have been corking? couldn't he have been corking? couldn't we have been corking? couldn't you have been corking? couldn't they have been corking?