I can brevet you can brevet he can brevet we can brevet you can brevet they can brevet
V-ing form
I can be breveting you can be breveting he can be breveting we can be breveting you can be breveting they can be breveting
Perfect
I can have breveted you can have breveted he can have breveted we can have breveted you can have breveted they can have breveted
V-ing perfect
I can have been breveting you can have been breveting he can have been breveting we can have been breveting you can have been breveting they can have been breveting
Negation
Simple form
I cannot brevet you cannot brevet he cannot brevet we cannot brevet you cannot brevet they cannot brevet
V-ing form
I cannot be breveting you cannot be breveting he cannot be breveting we cannot be breveting you cannot be breveting they cannot be breveting
Perfect
I cannot have breveted you cannot have breveted he cannot have breveted we cannot have breveted you cannot have breveted they cannot have breveted
V-ing perfect
I cannot have been breveting you cannot have been breveting he cannot have been breveting we cannot have been breveting you cannot have been breveting they cannot have been breveting
Interrogative form
Simple form
can I brevet? can you brevet? can he brevet? can we brevet? can you brevet? can they brevet?
V-ing form
can I be breveting? can you be breveting? can he be breveting? can we be breveting? can you be breveting? can they be breveting?
Perfect
can I have breveted? can you have breveted? can he have breveted? can we have breveted? can you have breveted? can they have breveted?
V-ing perfect
can I have been breveting? can you have been breveting? can he have been breveting? can we have been breveting? can you have been breveting? can they have been breveting?
Interro-negative form
Simple form
can I not brevet? can you not brevet? can he not brevet? can we not brevet? can you not brevet? can they not brevet?
V-ing form
can I not be breveting? can you not be breveting? can he not be breveting? can we not be breveting? can you not be breveting? can they not be breveting?
Perfect
can I not have breveted? can you not have breveted? can he not have breveted? can we not have breveted? can you not have breveted? can they not have breveted?
V-ing perfect
can I not have been breveting? can you not have been breveting? can he not have been breveting? can we not have been breveting? can you not have been breveting? can they not have been breveting?