English verb conjugation
COULD SKY

Regular verb: sky - skied - skied

Affirmation

Simple form	V-ing form
I could sky you could sky she could sky we could sky you could sky they could sky	I could be skying you could be skying she could be skying we could be skying you could be skying they could be skying
Perfect	V-ing perfect
I could have skied you could have skied she could have skied we could have skied you could have skied they could have skied	I could have been skying you could have been skying she could have been skying we could have been skying you could have been skying they could have been skying

Negation

Simple form	V-ing form
I couldn't sky you couldn't sky she couldn't sky we couldn't sky you couldn't sky they couldn't sky	I couldn't be skying you couldn't be skying she couldn't be skying we couldn't be skying you couldn't be skying they couldn't be skying
Perfect	V-ing perfect
I couldn't have skied you couldn't have skied she couldn't have skied we couldn't have skied you couldn't have skied they couldn't have skied	I couldn't have been skying you couldn't have been skying she couldn't have been skying we couldn't have been skying you couldn't have been skying they couldn't have been skying

Interrogative form

Simple form	V-ing form
could I sky? could you sky? could she sky? could we sky? could you sky? could they sky?	could I be skying? could you be skying? could she be skying? could we be skying? could you be skying? could they be skying?
Perfect	V-ing perfect
could I have skied? could you have skied? could she have skied? could we have skied? could you have skied? could they have skied?	could I have been skying? could you have been skying? could she have been skying? could we have been skying? could you have been skying? could they have been skying?

Interro-negative form

Simple form	V-ing form
couldn't I sky? couldn't you sky? couldn't she sky? couldn't we sky? couldn't you sky? couldn't they sky?	couldn't I be skying? couldn't you be skying? couldn't she be skying? couldn't we be skying? couldn't you be skying? couldn't they be skying?
Perfect	V-ing perfect
couldn't I have skied? couldn't you have skied? couldn't she have skied? couldn't we have skied? couldn't you have skied? couldn't they have skied?	couldn't I have been skying? couldn't you have been skying? couldn't she have been skying? couldn't we have been skying? couldn't you have been skying? couldn't they have been skying?