English verb conjugation
CAN DO

Irregular verb: do - did - done

Affirmation

Simple form	V-ing form
I can do you can do he can do we can do you can do they can do	I can be doing you can be doing he can be doing we can be doing you can be doing they can be doing
Perfect	V-ing perfect
I can have done you can have done he can have done we can have done you can have done they can have done	I can have been doing you can have been doing he can have been doing we can have been doing you can have been doing they can have been doing

Negation

Simple form	V-ing form
I can't do you can't do he can't do we can't do you can't do they can't do	I can't be doing you can't be doing he can't be doing we can't be doing you can't be doing they can't be doing
Perfect	V-ing perfect
I can't have done you can't have done he can't have done we can't have done you can't have done they can't have done	I can't have been doing you can't have been doing he can't have been doing we can't have been doing you can't have been doing they can't have been doing

Interrogative form

Simple form	V-ing form
can I do? can you do? can he do? can we do? can you do? can they do?	can I be doing? can you be doing? can he be doing? can we be doing? can you be doing? can they be doing?
Perfect	V-ing perfect
can I have done? can you have done? can he have done? can we have done? can you have done? can they have done?	can I have been doing? can you have been doing? can he have been doing? can we have been doing? can you have been doing? can they have been doing?

Interro-negative form

Simple form	V-ing form
can't I do? can't you do? can't he do? can't we do? can't you do? can't they do?	can't I be doing? can't you be doing? can't he be doing? can't we be doing? can't you be doing? can't they be doing?
Perfect	V-ing perfect
can't I have done? can't you have done? can't he have done? can't we have done? can't you have done? can't they have done?	can't I have been doing? can't you have been doing? can't he have been doing? can't we have been doing? can't you have been doing? can't they have been doing?