I can winter you can winter she can winter we can winter you can winter they can winter
V-ing form
I can be wintering you can be wintering she can be wintering we can be wintering you can be wintering they can be wintering
Perfect
I can have wintered you can have wintered she can have wintered we can have wintered you can have wintered they can have wintered
V-ing perfect
I can have been wintering you can have been wintering she can have been wintering we can have been wintering you can have been wintering they can have been wintering
Negation
Simple form
I cannot winter you cannot winter she cannot winter we cannot winter you cannot winter they cannot winter
V-ing form
I cannot be wintering you cannot be wintering she cannot be wintering we cannot be wintering you cannot be wintering they cannot be wintering
Perfect
I cannot have wintered you cannot have wintered she cannot have wintered we cannot have wintered you cannot have wintered they cannot have wintered
V-ing perfect
I cannot have been wintering you cannot have been wintering she cannot have been wintering we cannot have been wintering you cannot have been wintering they cannot have been wintering
Interrogative form
Simple form
can I winter? can you winter? can she winter? can we winter? can you winter? can they winter?
V-ing form
can I be wintering? can you be wintering? can she be wintering? can we be wintering? can you be wintering? can they be wintering?
Perfect
can I have wintered? can you have wintered? can she have wintered? can we have wintered? can you have wintered? can they have wintered?
V-ing perfect
can I have been wintering? can you have been wintering? can she have been wintering? can we have been wintering? can you have been wintering? can they have been wintering?
Interro-negative form
Simple form
can I not winter? can you not winter? can she not winter? can we not winter? can you not winter? can they not winter?
V-ing form
can I not be wintering? can you not be wintering? can she not be wintering? can we not be wintering? can you not be wintering? can they not be wintering?
Perfect
can I not have wintered? can you not have wintered? can she not have wintered? can we not have wintered? can you not have wintered? can they not have wintered?
V-ing perfect
can I not have been wintering? can you not have been wintering? can she not have been wintering? can we not have been wintering? can you not have been wintering? can they not have been wintering?