I can tax you can tax he can tax we can tax you can tax they can tax
V-ing form
I can be taxing you can be taxing he can be taxing we can be taxing you can be taxing they can be taxing
Perfect
I can have taxed you can have taxed he can have taxed we can have taxed you can have taxed they can have taxed
V-ing perfect
I can have been taxing you can have been taxing he can have been taxing we can have been taxing you can have been taxing they can have been taxing
Negation
Simple form
I cannot tax you cannot tax he cannot tax we cannot tax you cannot tax they cannot tax
V-ing form
I cannot be taxing you cannot be taxing he cannot be taxing we cannot be taxing you cannot be taxing they cannot be taxing
Perfect
I cannot have taxed you cannot have taxed he cannot have taxed we cannot have taxed you cannot have taxed they cannot have taxed
V-ing perfect
I cannot have been taxing you cannot have been taxing he cannot have been taxing we cannot have been taxing you cannot have been taxing they cannot have been taxing
Interrogative form
Simple form
can I tax? can you tax? can he tax? can we tax? can you tax? can they tax?
V-ing form
can I be taxing? can you be taxing? can he be taxing? can we be taxing? can you be taxing? can they be taxing?
Perfect
can I have taxed? can you have taxed? can he have taxed? can we have taxed? can you have taxed? can they have taxed?
V-ing perfect
can I have been taxing? can you have been taxing? can he have been taxing? can we have been taxing? can you have been taxing? can they have been taxing?
Interro-negative form
Simple form
can I not tax? can you not tax? can he not tax? can we not tax? can you not tax? can they not tax?
V-ing form
can I not be taxing? can you not be taxing? can he not be taxing? can we not be taxing? can you not be taxing? can they not be taxing?
Perfect
can I not have taxed? can you not have taxed? can he not have taxed? can we not have taxed? can you not have taxed? can they not have taxed?
V-ing perfect
can I not have been taxing? can you not have been taxing? can he not have been taxing? can we not have been taxing? can you not have been taxing? can they not have been taxing?