English verb conjugation
CAN ROC

Regular verb: roc - roced - roced

Affirmation

Simple form	V-ing form
I can roc you can roc he can roc we can roc you can roc they can roc	I can be rocing you can be rocing he can be rocing we can be rocing you can be rocing they can be rocing
Perfect	V-ing perfect
I can have roced you can have roced he can have roced we can have roced you can have roced they can have roced	I can have been rocing you can have been rocing he can have been rocing we can have been rocing you can have been rocing they can have been rocing

Negation

Simple form	V-ing form
I can't roc you can't roc he can't roc we can't roc you can't roc they can't roc	I can't be rocing you can't be rocing he can't be rocing we can't be rocing you can't be rocing they can't be rocing
Perfect	V-ing perfect
I can't have roced you can't have roced he can't have roced we can't have roced you can't have roced they can't have roced	I can't have been rocing you can't have been rocing he can't have been rocing we can't have been rocing you can't have been rocing they can't have been rocing

Interrogative form

Simple form	V-ing form
can I roc? can you roc? can he roc? can we roc? can you roc? can they roc?	can I be rocing? can you be rocing? can he be rocing? can we be rocing? can you be rocing? can they be rocing?
Perfect	V-ing perfect
can I have roced? can you have roced? can he have roced? can we have roced? can you have roced? can they have roced?	can I have been rocing? can you have been rocing? can he have been rocing? can we have been rocing? can you have been rocing? can they have been rocing?

Interro-negative form

Simple form	V-ing form
can't I roc? can't you roc? can't he roc? can't we roc? can't you roc? can't they roc?	can't I be rocing? can't you be rocing? can't he be rocing? can't we be rocing? can't you be rocing? can't they be rocing?
Perfect	V-ing perfect
can't I have roced? can't you have roced? can't he have roced? can't we have roced? can't you have roced? can't they have roced?	can't I have been rocing? can't you have been rocing? can't he have been rocing? can't we have been rocing? can't you have been rocing? can't they have been rocing?