English verb conjugation
CAN DO

Irregular verb: do - did - done

Affirmation

Simple form	V-ing form
I can do you can do she can do we can do you can do they can do	I can be doing you can be doing she 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 she 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 she 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 she 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 she 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 she 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 she 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 she do? can we do? can you do? can they do?	can I be doing? can you be doing? can she 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 she 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 she 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 she 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 she 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 she 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 she have been doing? can't we have been doing? can't you have been doing? can't they have been doing?