English verb conjugation
CAN SKY

Regular verb: sky - skied - skied

Affirmation

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

Negation

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

Interrogative form

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

Interro-negative form

Simple form	V-ing form
can I not sky? can you not sky? can she not sky? can we not sky? can you not sky? can they not sky?	can I not be skying? can you not be skying? can she not be skying? can we not be skying? can you not be skying? can they not be skying?
Perfect	V-ing perfect
can I not have skied? can you not have skied? can she not have skied? can we not have skied? can you not have skied? can they not have skied?	can I not have been skying? can you not have been skying? can she not have been skying? can we not have been skying? can you not have been skying? can they not have been skying?