I can deduct you can deduct he can deduct we can deduct you can deduct they can deduct
V-ing form
I can be deducting you can be deducting he can be deducting we can be deducting you can be deducting they can be deducting
Perfect
I can have deducted you can have deducted he can have deducted we can have deducted you can have deducted they can have deducted
V-ing perfect
I can have been deducting you can have been deducting he can have been deducting we can have been deducting you can have been deducting they can have been deducting
Negation
Simple form
I cannot deduct you cannot deduct he cannot deduct we cannot deduct you cannot deduct they cannot deduct
V-ing form
I cannot be deducting you cannot be deducting he cannot be deducting we cannot be deducting you cannot be deducting they cannot be deducting
Perfect
I cannot have deducted you cannot have deducted he cannot have deducted we cannot have deducted you cannot have deducted they cannot have deducted
V-ing perfect
I cannot have been deducting you cannot have been deducting he cannot have been deducting we cannot have been deducting you cannot have been deducting they cannot have been deducting
Interrogative form
Simple form
can I deduct? can you deduct? can he deduct? can we deduct? can you deduct? can they deduct?
V-ing form
can I be deducting? can you be deducting? can he be deducting? can we be deducting? can you be deducting? can they be deducting?
Perfect
can I have deducted? can you have deducted? can he have deducted? can we have deducted? can you have deducted? can they have deducted?
V-ing perfect
can I have been deducting? can you have been deducting? can he have been deducting? can we have been deducting? can you have been deducting? can they have been deducting?
Interro-negative form
Simple form
can I not deduct? can you not deduct? can he not deduct? can we not deduct? can you not deduct? can they not deduct?
V-ing form
can I not be deducting? can you not be deducting? can he not be deducting? can we not be deducting? can you not be deducting? can they not be deducting?
Perfect
can I not have deducted? can you not have deducted? can he not have deducted? can we not have deducted? can you not have deducted? can they not have deducted?
V-ing perfect
can I not have been deducting? can you not have been deducting? can he not have been deducting? can we not have been deducting? can you not have been deducting? can they not have been deducting?