English verb conjugation
COULD WHELP

Regular verb: whelp - whelped - whelped

Affirmation

Simple form	V-ing form
I could whelp you could whelp he could whelp we could whelp you could whelp they could whelp	I could be whelping you could be whelping he could be whelping we could be whelping you could be whelping they could be whelping
Perfect	V-ing perfect
I could have whelped you could have whelped he could have whelped we could have whelped you could have whelped they could have whelped	I could have been whelping you could have been whelping he could have been whelping we could have been whelping you could have been whelping they could have been whelping

Negation

Simple form	V-ing form
I couldn't whelp you couldn't whelp he couldn't whelp we couldn't whelp you couldn't whelp they couldn't whelp	I couldn't be whelping you couldn't be whelping he couldn't be whelping we couldn't be whelping you couldn't be whelping they couldn't be whelping
Perfect	V-ing perfect
I couldn't have whelped you couldn't have whelped he couldn't have whelped we couldn't have whelped you couldn't have whelped they couldn't have whelped	I couldn't have been whelping you couldn't have been whelping he couldn't have been whelping we couldn't have been whelping you couldn't have been whelping they couldn't have been whelping

Interrogative form

Simple form	V-ing form
could I whelp? could you whelp? could he whelp? could we whelp? could you whelp? could they whelp?	could I be whelping? could you be whelping? could he be whelping? could we be whelping? could you be whelping? could they be whelping?
Perfect	V-ing perfect
could I have whelped? could you have whelped? could he have whelped? could we have whelped? could you have whelped? could they have whelped?	could I have been whelping? could you have been whelping? could he have been whelping? could we have been whelping? could you have been whelping? could they have been whelping?

Interro-negative form

Simple form	V-ing form
couldn't I whelp? couldn't you whelp? couldn't he whelp? couldn't we whelp? couldn't you whelp? couldn't they whelp?	couldn't I be whelping? couldn't you be whelping? couldn't he be whelping? couldn't we be whelping? couldn't you be whelping? couldn't they be whelping?
Perfect	V-ing perfect
couldn't I have whelped? couldn't you have whelped? couldn't he have whelped? couldn't we have whelped? couldn't you have whelped? couldn't they have whelped?	couldn't I have been whelping? couldn't you have been whelping? couldn't he have been whelping? couldn't we have been whelping? couldn't you have been whelping? couldn't they have been whelping?