I can deface you can deface he can deface we can deface you can deface they can deface
V-ing form
I can be defacing you can be defacing he can be defacing we can be defacing you can be defacing they can be defacing
Perfect
I can have defaced you can have defaced he can have defaced we can have defaced you can have defaced they can have defaced
V-ing perfect
I can have been defacing you can have been defacing he can have been defacing we can have been defacing you can have been defacing they can have been defacing
Negation
Simple form
I cannot deface you cannot deface he cannot deface we cannot deface you cannot deface they cannot deface
V-ing form
I cannot be defacing you cannot be defacing he cannot be defacing we cannot be defacing you cannot be defacing they cannot be defacing
Perfect
I cannot have defaced you cannot have defaced he cannot have defaced we cannot have defaced you cannot have defaced they cannot have defaced
V-ing perfect
I cannot have been defacing you cannot have been defacing he cannot have been defacing we cannot have been defacing you cannot have been defacing they cannot have been defacing
Interrogative form
Simple form
can I deface? can you deface? can he deface? can we deface? can you deface? can they deface?
V-ing form
can I be defacing? can you be defacing? can he be defacing? can we be defacing? can you be defacing? can they be defacing?
Perfect
can I have defaced? can you have defaced? can he have defaced? can we have defaced? can you have defaced? can they have defaced?
V-ing perfect
can I have been defacing? can you have been defacing? can he have been defacing? can we have been defacing? can you have been defacing? can they have been defacing?
Interro-negative form
Simple form
can I not deface? can you not deface? can he not deface? can we not deface? can you not deface? can they not deface?
V-ing form
can I not be defacing? can you not be defacing? can he not be defacing? can we not be defacing? can you not be defacing? can they not be defacing?
Perfect
can I not have defaced? can you not have defaced? can he not have defaced? can we not have defaced? can you not have defaced? can they not have defaced?
V-ing perfect
can I not have been defacing? can you not have been defacing? can he not have been defacing? can we not have been defacing? can you not have been defacing? can they not have been defacing?