I can avalanche you can avalanche he can avalanche we can avalanche you can avalanche they can avalanche
V-ing form
I can be avalanching you can be avalanching he can be avalanching we can be avalanching you can be avalanching they can be avalanching
Perfect
I can have avalanched you can have avalanched he can have avalanched we can have avalanched you can have avalanched they can have avalanched
V-ing perfect
I can have been avalanching you can have been avalanching he can have been avalanching we can have been avalanching you can have been avalanching they can have been avalanching
Negation
Simple form
I cannot avalanche you cannot avalanche he cannot avalanche we cannot avalanche you cannot avalanche they cannot avalanche
V-ing form
I cannot be avalanching you cannot be avalanching he cannot be avalanching we cannot be avalanching you cannot be avalanching they cannot be avalanching
Perfect
I cannot have avalanched you cannot have avalanched he cannot have avalanched we cannot have avalanched you cannot have avalanched they cannot have avalanched
V-ing perfect
I cannot have been avalanching you cannot have been avalanching he cannot have been avalanching we cannot have been avalanching you cannot have been avalanching they cannot have been avalanching
Interrogative form
Simple form
can I avalanche? can you avalanche? can he avalanche? can we avalanche? can you avalanche? can they avalanche?
V-ing form
can I be avalanching? can you be avalanching? can he be avalanching? can we be avalanching? can you be avalanching? can they be avalanching?
Perfect
can I have avalanched? can you have avalanched? can he have avalanched? can we have avalanched? can you have avalanched? can they have avalanched?
V-ing perfect
can I have been avalanching? can you have been avalanching? can he have been avalanching? can we have been avalanching? can you have been avalanching? can they have been avalanching?
Interro-negative form
Simple form
can I not avalanche? can you not avalanche? can he not avalanche? can we not avalanche? can you not avalanche? can they not avalanche?
V-ing form
can I not be avalanching? can you not be avalanching? can he not be avalanching? can we not be avalanching? can you not be avalanching? can they not be avalanching?
Perfect
can I not have avalanched? can you not have avalanched? can he not have avalanched? can we not have avalanched? can you not have avalanched? can they not have avalanched?
V-ing perfect
can I not have been avalanching? can you not have been avalanching? can he not have been avalanching? can we not have been avalanching? can you not have been avalanching? can they not have been avalanching?