Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I can ski ski you can ski ski he can ski ski we can ski ski you can ski ski they can ski ski
V-ing form
I can be ski skiing you can be ski skiing he can be ski skiing we can be ski skiing you can be ski skiing they can be ski skiing
Perfect
I can have ski skied you can have ski skied he can have ski skied we can have ski skied you can have ski skied they can have ski skied
V-ing perfect
I can have been ski skiing you can have been ski skiing he can have been ski skiing we can have been ski skiing you can have been ski skiing they can have been ski skiing
Negation
Simple form
I can't ski ski you can't ski ski he can't ski ski we can't ski ski you can't ski ski they can't ski ski
V-ing form
I can't be ski skiing you can't be ski skiing he can't be ski skiing we can't be ski skiing you can't be ski skiing they can't be ski skiing
Perfect
I can't have ski skied you can't have ski skied he can't have ski skied we can't have ski skied you can't have ski skied they can't have ski skied
V-ing perfect
I can't have been ski skiing you can't have been ski skiing he can't have been ski skiing we can't have been ski skiing you can't have been ski skiing they can't have been ski skiing
Interrogative form
Simple form
can I ski ski? can you ski ski? can he ski ski? can we ski ski? can you ski ski? can they ski ski?
V-ing form
can I be ski skiing? can you be ski skiing? can he be ski skiing? can we be ski skiing? can you be ski skiing? can they be ski skiing?
Perfect
can I have ski skied? can you have ski skied? can he have ski skied? can we have ski skied? can you have ski skied? can they have ski skied?
V-ing perfect
can I have been ski skiing? can you have been ski skiing? can he have been ski skiing? can we have been ski skiing? can you have been ski skiing? can they have been ski skiing?
Interro-negative form
Simple form
can't I ski ski? can't you ski ski? can't he ski ski? can't we ski ski? can't you ski ski? can't they ski ski?
V-ing form
can't I be ski skiing? can't you be ski skiing? can't he be ski skiing? can't we be ski skiing? can't you be ski skiing? can't they be ski skiing?
Perfect
can't I have ski skied? can't you have ski skied? can't he have ski skied? can't we have ski skied? can't you have ski skied? can't they have ski skied?
V-ing perfect
can't I have been ski skiing? can't you have been ski skiing? can't he have been ski skiing? can't we have been ski skiing? can't you have been ski skiing? can't they have been ski skiing?