I can furnish you can furnish he can furnish we can furnish you can furnish they can furnish
V-ing form
I can be furnishing you can be furnishing he can be furnishing we can be furnishing you can be furnishing they can be furnishing
Perfect
I can have furnished you can have furnished he can have furnished we can have furnished you can have furnished they can have furnished
V-ing perfect
I can have been furnishing you can have been furnishing he can have been furnishing we can have been furnishing you can have been furnishing they can have been furnishing
Negation
Simple form
I cannot furnish you cannot furnish he cannot furnish we cannot furnish you cannot furnish they cannot furnish
V-ing form
I cannot be furnishing you cannot be furnishing he cannot be furnishing we cannot be furnishing you cannot be furnishing they cannot be furnishing
Perfect
I cannot have furnished you cannot have furnished he cannot have furnished we cannot have furnished you cannot have furnished they cannot have furnished
V-ing perfect
I cannot have been furnishing you cannot have been furnishing he cannot have been furnishing we cannot have been furnishing you cannot have been furnishing they cannot have been furnishing
Interrogative form
Simple form
can I furnish? can you furnish? can he furnish? can we furnish? can you furnish? can they furnish?
V-ing form
can I be furnishing? can you be furnishing? can he be furnishing? can we be furnishing? can you be furnishing? can they be furnishing?
Perfect
can I have furnished? can you have furnished? can he have furnished? can we have furnished? can you have furnished? can they have furnished?
V-ing perfect
can I have been furnishing? can you have been furnishing? can he have been furnishing? can we have been furnishing? can you have been furnishing? can they have been furnishing?
Interro-negative form
Simple form
can I not furnish? can you not furnish? can he not furnish? can we not furnish? can you not furnish? can they not furnish?
V-ing form
can I not be furnishing? can you not be furnishing? can he not be furnishing? can we not be furnishing? can you not be furnishing? can they not be furnishing?
Perfect
can I not have furnished? can you not have furnished? can he not have furnished? can we not have furnished? can you not have furnished? can they not have furnished?
V-ing perfect
can I not have been furnishing? can you not have been furnishing? can he not have been furnishing? can we not have been furnishing? can you not have been furnishing? can they not have been furnishing?