I can snowshoe you can snowshoe he can snowshoe we can snowshoe you can snowshoe they can snowshoe
V-ing form
I can be snowshoing you can be snowshoing he can be snowshoing we can be snowshoing you can be snowshoing they can be snowshoing
Perfect
I can have snowshoed you can have snowshoed he can have snowshoed we can have snowshoed you can have snowshoed they can have snowshoed
V-ing perfect
I can have been snowshoing you can have been snowshoing he can have been snowshoing we can have been snowshoing you can have been snowshoing they can have been snowshoing
Negation
Simple form
I cannot snowshoe you cannot snowshoe he cannot snowshoe we cannot snowshoe you cannot snowshoe they cannot snowshoe
V-ing form
I cannot be snowshoing you cannot be snowshoing he cannot be snowshoing we cannot be snowshoing you cannot be snowshoing they cannot be snowshoing
Perfect
I cannot have snowshoed you cannot have snowshoed he cannot have snowshoed we cannot have snowshoed you cannot have snowshoed they cannot have snowshoed
V-ing perfect
I cannot have been snowshoing you cannot have been snowshoing he cannot have been snowshoing we cannot have been snowshoing you cannot have been snowshoing they cannot have been snowshoing
Interrogative form
Simple form
can I snowshoe? can you snowshoe? can he snowshoe? can we snowshoe? can you snowshoe? can they snowshoe?
V-ing form
can I be snowshoing? can you be snowshoing? can he be snowshoing? can we be snowshoing? can you be snowshoing? can they be snowshoing?
Perfect
can I have snowshoed? can you have snowshoed? can he have snowshoed? can we have snowshoed? can you have snowshoed? can they have snowshoed?
V-ing perfect
can I have been snowshoing? can you have been snowshoing? can he have been snowshoing? can we have been snowshoing? can you have been snowshoing? can they have been snowshoing?
Interro-negative form
Simple form
can I not snowshoe? can you not snowshoe? can he not snowshoe? can we not snowshoe? can you not snowshoe? can they not snowshoe?
V-ing form
can I not be snowshoing? can you not be snowshoing? can he not be snowshoing? can we not be snowshoing? can you not be snowshoing? can they not be snowshoing?
Perfect
can I not have snowshoed? can you not have snowshoed? can he not have snowshoed? can we not have snowshoed? can you not have snowshoed? can they not have snowshoed?
V-ing perfect
can I not have been snowshoing? can you not have been snowshoing? can he not have been snowshoing? can we not have been snowshoing? can you not have been snowshoing? can they not have been snowshoing?