English verb conjugation
COULD YAUP

Regular verb: yaup - yauped - yauped

Affirmation

Simple form	V-ing form
I could yaup you could yaup he could yaup we could yaup you could yaup they could yaup	I could be yauping you could be yauping he could be yauping we could be yauping you could be yauping they could be yauping
Perfect	V-ing perfect
I could have yauped you could have yauped he could have yauped we could have yauped you could have yauped they could have yauped	I could have been yauping you could have been yauping he could have been yauping we could have been yauping you could have been yauping they could have been yauping

Negation

Simple form	V-ing form
I couldn't yaup you couldn't yaup he couldn't yaup we couldn't yaup you couldn't yaup they couldn't yaup	I couldn't be yauping you couldn't be yauping he couldn't be yauping we couldn't be yauping you couldn't be yauping they couldn't be yauping
Perfect	V-ing perfect
I couldn't have yauped you couldn't have yauped he couldn't have yauped we couldn't have yauped you couldn't have yauped they couldn't have yauped	I couldn't have been yauping you couldn't have been yauping he couldn't have been yauping we couldn't have been yauping you couldn't have been yauping they couldn't have been yauping

Interrogative form

Simple form	V-ing form
could I yaup? could you yaup? could he yaup? could we yaup? could you yaup? could they yaup?	could I be yauping? could you be yauping? could he be yauping? could we be yauping? could you be yauping? could they be yauping?
Perfect	V-ing perfect
could I have yauped? could you have yauped? could he have yauped? could we have yauped? could you have yauped? could they have yauped?	could I have been yauping? could you have been yauping? could he have been yauping? could we have been yauping? could you have been yauping? could they have been yauping?

Interro-negative form

Simple form	V-ing form
couldn't I yaup? couldn't you yaup? couldn't he yaup? couldn't we yaup? couldn't you yaup? couldn't they yaup?	couldn't I be yauping? couldn't you be yauping? couldn't he be yauping? couldn't we be yauping? couldn't you be yauping? couldn't they be yauping?
Perfect	V-ing perfect
couldn't I have yauped? couldn't you have yauped? couldn't he have yauped? couldn't we have yauped? couldn't you have yauped? couldn't they have yauped?	couldn't I have been yauping? couldn't you have been yauping? couldn't he have been yauping? couldn't we have been yauping? couldn't you have been yauping? couldn't they have been yauping?