I can burnish you can burnish he can burnish we can burnish you can burnish they can burnish
V-ing form
I can be burnishing you can be burnishing he can be burnishing we can be burnishing you can be burnishing they can be burnishing
Perfect
I can have burnished you can have burnished he can have burnished we can have burnished you can have burnished they can have burnished
V-ing perfect
I can have been burnishing you can have been burnishing he can have been burnishing we can have been burnishing you can have been burnishing they can have been burnishing
Negation
Simple form
I cannot burnish you cannot burnish he cannot burnish we cannot burnish you cannot burnish they cannot burnish
V-ing form
I cannot be burnishing you cannot be burnishing he cannot be burnishing we cannot be burnishing you cannot be burnishing they cannot be burnishing
Perfect
I cannot have burnished you cannot have burnished he cannot have burnished we cannot have burnished you cannot have burnished they cannot have burnished
V-ing perfect
I cannot have been burnishing you cannot have been burnishing he cannot have been burnishing we cannot have been burnishing you cannot have been burnishing they cannot have been burnishing
Interrogative form
Simple form
can I burnish? can you burnish? can he burnish? can we burnish? can you burnish? can they burnish?
V-ing form
can I be burnishing? can you be burnishing? can he be burnishing? can we be burnishing? can you be burnishing? can they be burnishing?
Perfect
can I have burnished? can you have burnished? can he have burnished? can we have burnished? can you have burnished? can they have burnished?
V-ing perfect
can I have been burnishing? can you have been burnishing? can he have been burnishing? can we have been burnishing? can you have been burnishing? can they have been burnishing?
Interro-negative form
Simple form
can I not burnish? can you not burnish? can he not burnish? can we not burnish? can you not burnish? can they not burnish?
V-ing form
can I not be burnishing? can you not be burnishing? can he not be burnishing? can we not be burnishing? can you not be burnishing? can they not be burnishing?
Perfect
can I not have burnished? can you not have burnished? can he not have burnished? can we not have burnished? can you not have burnished? can they not have burnished?
V-ing perfect
can I not have been burnishing? can you not have been burnishing? can he not have been burnishing? can we not have been burnishing? can you not have been burnishing? can they not have been burnishing?