English verb conjugation
COULD OUTPERFORM

Regular verb: outperform - outperformed - outperformed

Affirmation

Simple form	V-ing form
I could outperform you could outperform he could outperform we could outperform you could outperform they could outperform	I could be outperforming you could be outperforming he could be outperforming we could be outperforming you could be outperforming they could be outperforming
Perfect	V-ing perfect
I could have outperformed you could have outperformed he could have outperformed we could have outperformed you could have outperformed they could have outperformed	I could have been outperforming you could have been outperforming he could have been outperforming we could have been outperforming you could have been outperforming they could have been outperforming

Negation

Simple form	V-ing form
I couldn't outperform you couldn't outperform he couldn't outperform we couldn't outperform you couldn't outperform they couldn't outperform	I couldn't be outperforming you couldn't be outperforming he couldn't be outperforming we couldn't be outperforming you couldn't be outperforming they couldn't be outperforming
Perfect	V-ing perfect
I couldn't have outperformed you couldn't have outperformed he couldn't have outperformed we couldn't have outperformed you couldn't have outperformed they couldn't have outperformed	I couldn't have been outperforming you couldn't have been outperforming he couldn't have been outperforming we couldn't have been outperforming you couldn't have been outperforming they couldn't have been outperforming

Interrogative form

Simple form	V-ing form
could I outperform? could you outperform? could he outperform? could we outperform? could you outperform? could they outperform?	could I be outperforming? could you be outperforming? could he be outperforming? could we be outperforming? could you be outperforming? could they be outperforming?
Perfect	V-ing perfect
could I have outperformed? could you have outperformed? could he have outperformed? could we have outperformed? could you have outperformed? could they have outperformed?	could I have been outperforming? could you have been outperforming? could he have been outperforming? could we have been outperforming? could you have been outperforming? could they have been outperforming?

Interro-negative form

Simple form	V-ing form
couldn't I outperform? couldn't you outperform? couldn't he outperform? couldn't we outperform? couldn't you outperform? couldn't they outperform?	couldn't I be outperforming? couldn't you be outperforming? couldn't he be outperforming? couldn't we be outperforming? couldn't you be outperforming? couldn't they be outperforming?
Perfect	V-ing perfect
couldn't I have outperformed? couldn't you have outperformed? couldn't he have outperformed? couldn't we have outperformed? couldn't you have outperformed? couldn't they have outperformed?	couldn't I have been outperforming? couldn't you have been outperforming? couldn't he have been outperforming? couldn't we have been outperforming? couldn't you have been outperforming? couldn't they have been outperforming?