English verb conjugation
COULD SKEW

Regular verb: skew - skewed - skewed

Affirmation

Simple form	V-ing form
I could skew you could skew he could skew we could skew you could skew they could skew	I could be skewing you could be skewing he could be skewing we could be skewing you could be skewing they could be skewing
Perfect	V-ing perfect
I could have skewed you could have skewed he could have skewed we could have skewed you could have skewed they could have skewed	I could have been skewing you could have been skewing he could have been skewing we could have been skewing you could have been skewing they could have been skewing

Negation

Simple form	V-ing form
I couldn't skew you couldn't skew he couldn't skew we couldn't skew you couldn't skew they couldn't skew	I couldn't be skewing you couldn't be skewing he couldn't be skewing we couldn't be skewing you couldn't be skewing they couldn't be skewing
Perfect	V-ing perfect
I couldn't have skewed you couldn't have skewed he couldn't have skewed we couldn't have skewed you couldn't have skewed they couldn't have skewed	I couldn't have been skewing you couldn't have been skewing he couldn't have been skewing we couldn't have been skewing you couldn't have been skewing they couldn't have been skewing

Interrogative form

Simple form	V-ing form
could I skew? could you skew? could he skew? could we skew? could you skew? could they skew?	could I be skewing? could you be skewing? could he be skewing? could we be skewing? could you be skewing? could they be skewing?
Perfect	V-ing perfect
could I have skewed? could you have skewed? could he have skewed? could we have skewed? could you have skewed? could they have skewed?	could I have been skewing? could you have been skewing? could he have been skewing? could we have been skewing? could you have been skewing? could they have been skewing?

Interro-negative form

Simple form	V-ing form
couldn't I skew? couldn't you skew? couldn't he skew? couldn't we skew? couldn't you skew? couldn't they skew?	couldn't I be skewing? couldn't you be skewing? couldn't he be skewing? couldn't we be skewing? couldn't you be skewing? couldn't they be skewing?
Perfect	V-ing perfect
couldn't I have skewed? couldn't you have skewed? couldn't he have skewed? couldn't we have skewed? couldn't you have skewed? couldn't they have skewed?	couldn't I have been skewing? couldn't you have been skewing? couldn't he have been skewing? couldn't we have been skewing? couldn't you have been skewing? couldn't they have been skewing?