English verb conjugation
CAN TAX

Regular verb: tax - taxed - taxed

Affirmation

Simple form	V-ing form
I can tax you can tax he can tax we can tax you can tax they can tax	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	V-ing 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	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	V-ing form
I can't tax you can't tax he can't tax we can't tax you can't tax they can't tax	I can't be taxing you can't be taxing he can't be taxing we can't be taxing you can't be taxing they can't be taxing
Perfect	V-ing perfect
I can't have taxed you can't have taxed he can't have taxed we can't have taxed you can't have taxed they can't have taxed	I can't have been taxing you can't have been taxing he can't have been taxing we can't have been taxing you can't have been taxing they can't have been taxing

Interrogative form

Simple form	V-ing form
can I tax? can you tax? can he tax? can we tax? can you tax? can they tax?	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	V-ing 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?	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	V-ing form
can't I tax? can't you tax? can't he tax? can't we tax? can't you tax? can't they tax?	can't I be taxing? can't you be taxing? can't he be taxing? can't we be taxing? can't you be taxing? can't they be taxing?
Perfect	V-ing perfect
can't I have taxed? can't you have taxed? can't he have taxed? can't we have taxed? can't you have taxed? can't they have taxed?	can't I have been taxing? can't you have been taxing? can't he have been taxing? can't we have been taxing? can't you have been taxing? can't they have been taxing?