English verb conjugation
COULD OUTPUPIL

Regular verb: outpupil - outpupiled - outpupiled

Affirmation

Simple form	V-ing form
I could outpupil you could outpupil he could outpupil we could outpupil you could outpupil they could outpupil	I could be outpupiling you could be outpupiling he could be outpupiling we could be outpupiling you could be outpupiling they could be outpupiling
Perfect	V-ing perfect
I could have outpupiled you could have outpupiled he could have outpupiled we could have outpupiled you could have outpupiled they could have outpupiled	I could have been outpupiling you could have been outpupiling he could have been outpupiling we could have been outpupiling you could have been outpupiling they could have been outpupiling

Negation

Simple form	V-ing form
I couldn't outpupil you couldn't outpupil he couldn't outpupil we couldn't outpupil you couldn't outpupil they couldn't outpupil	I couldn't be outpupiling you couldn't be outpupiling he couldn't be outpupiling we couldn't be outpupiling you couldn't be outpupiling they couldn't be outpupiling
Perfect	V-ing perfect
I couldn't have outpupiled you couldn't have outpupiled he couldn't have outpupiled we couldn't have outpupiled you couldn't have outpupiled they couldn't have outpupiled	I couldn't have been outpupiling you couldn't have been outpupiling he couldn't have been outpupiling we couldn't have been outpupiling you couldn't have been outpupiling they couldn't have been outpupiling

Interrogative form

Simple form	V-ing form
could I outpupil? could you outpupil? could he outpupil? could we outpupil? could you outpupil? could they outpupil?	could I be outpupiling? could you be outpupiling? could he be outpupiling? could we be outpupiling? could you be outpupiling? could they be outpupiling?
Perfect	V-ing perfect
could I have outpupiled? could you have outpupiled? could he have outpupiled? could we have outpupiled? could you have outpupiled? could they have outpupiled?	could I have been outpupiling? could you have been outpupiling? could he have been outpupiling? could we have been outpupiling? could you have been outpupiling? could they have been outpupiling?

Interro-negative form

Simple form	V-ing form
couldn't I outpupil? couldn't you outpupil? couldn't he outpupil? couldn't we outpupil? couldn't you outpupil? couldn't they outpupil?	couldn't I be outpupiling? couldn't you be outpupiling? couldn't he be outpupiling? couldn't we be outpupiling? couldn't you be outpupiling? couldn't they be outpupiling?
Perfect	V-ing perfect
couldn't I have outpupiled? couldn't you have outpupiled? couldn't he have outpupiled? couldn't we have outpupiled? couldn't you have outpupiled? couldn't they have outpupiled?	couldn't I have been outpupiling? couldn't you have been outpupiling? couldn't he have been outpupiling? couldn't we have been outpupiling? couldn't you have been outpupiling? couldn't they have been outpupiling?