English verb conjugation
COULD SHARK

Regular verb: shark - sharked - sharked

Affirmation

Simple form	V-ing form
I could shark you could shark he could shark we could shark you could shark they could shark	I could be sharking you could be sharking he could be sharking we could be sharking you could be sharking they could be sharking
Perfect	V-ing perfect
I could have sharked you could have sharked he could have sharked we could have sharked you could have sharked they could have sharked	I could have been sharking you could have been sharking he could have been sharking we could have been sharking you could have been sharking they could have been sharking

Negation

Simple form	V-ing form
I could not shark you could not shark he could not shark we could not shark you could not shark they could not shark	I could not be sharking you could not be sharking he could not be sharking we could not be sharking you could not be sharking they could not be sharking
Perfect	V-ing perfect
I could not have sharked you could not have sharked he could not have sharked we could not have sharked you could not have sharked they could not have sharked	I could not have been sharking you could not have been sharking he could not have been sharking we could not have been sharking you could not have been sharking they could not have been sharking

Interrogative form

Simple form	V-ing form
could I shark? could you shark? could he shark? could we shark? could you shark? could they shark?	could I be sharking? could you be sharking? could he be sharking? could we be sharking? could you be sharking? could they be sharking?
Perfect	V-ing perfect
could I have sharked? could you have sharked? could he have sharked? could we have sharked? could you have sharked? could they have sharked?	could I have been sharking? could you have been sharking? could he have been sharking? could we have been sharking? could you have been sharking? could they have been sharking?

Interro-negative form

Simple form	V-ing form
could I not shark? could you not shark? could he not shark? could we not shark? could you not shark? could they not shark?	could I not be sharking? could you not be sharking? could he not be sharking? could we not be sharking? could you not be sharking? could they not be sharking?
Perfect	V-ing perfect
could I not have sharked? could you not have sharked? could he not have sharked? could we not have sharked? could you not have sharked? could they not have sharked?	could I not have been sharking? could you not have been sharking? could he not have been sharking? could we not have been sharking? could you not have been sharking? could they not have been sharking?