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