English verb conjugation
COULD UPCHUCK

Regular verb: upchuck - upchucked - upchucked

Affirmation

Simple form	V-ing form
I could upchuck you could upchuck he could upchuck we could upchuck you could upchuck they could upchuck	I could be upchucking you could be upchucking he could be upchucking we could be upchucking you could be upchucking they could be upchucking
Perfect	V-ing perfect
I could have upchucked you could have upchucked he could have upchucked we could have upchucked you could have upchucked they could have upchucked	I could have been upchucking you could have been upchucking he could have been upchucking we could have been upchucking you could have been upchucking they could have been upchucking

Negation

Simple form	V-ing form
I could not upchuck you could not upchuck he could not upchuck we could not upchuck you could not upchuck they could not upchuck	I could not be upchucking you could not be upchucking he could not be upchucking we could not be upchucking you could not be upchucking they could not be upchucking
Perfect	V-ing perfect
I could not have upchucked you could not have upchucked he could not have upchucked we could not have upchucked you could not have upchucked they could not have upchucked	I could not have been upchucking you could not have been upchucking he could not have been upchucking we could not have been upchucking you could not have been upchucking they could not have been upchucking

Interrogative form

Simple form	V-ing form
could I upchuck? could you upchuck? could he upchuck? could we upchuck? could you upchuck? could they upchuck?	could I be upchucking? could you be upchucking? could he be upchucking? could we be upchucking? could you be upchucking? could they be upchucking?
Perfect	V-ing perfect
could I have upchucked? could you have upchucked? could he have upchucked? could we have upchucked? could you have upchucked? could they have upchucked?	could I have been upchucking? could you have been upchucking? could he have been upchucking? could we have been upchucking? could you have been upchucking? could they have been upchucking?

Interro-negative form

Simple form	V-ing form
could I not upchuck? could you not upchuck? could he not upchuck? could we not upchuck? could you not upchuck? could they not upchuck?	could I not be upchucking? could you not be upchucking? could he not be upchucking? could we not be upchucking? could you not be upchucking? could they not be upchucking?
Perfect	V-ing perfect
could I not have upchucked? could you not have upchucked? could he not have upchucked? could we not have upchucked? could you not have upchucked? could they not have upchucked?	could I not have been upchucking? could you not have been upchucking? could he not have been upchucking? could we not have been upchucking? could you not have been upchucking? could they not have been upchucking?