I can scrub you can scrub she can scrub we can scrub you can scrub they can scrub
V-ing form
I can be scrubbing you can be scrubbing she can be scrubbing we can be scrubbing you can be scrubbing they can be scrubbing
Perfect
I can have scrubbed you can have scrubbed she can have scrubbed we can have scrubbed you can have scrubbed they can have scrubbed
V-ing perfect
I can have been scrubbing you can have been scrubbing she can have been scrubbing we can have been scrubbing you can have been scrubbing they can have been scrubbing
Negation
Simple form
I can't scrub you can't scrub she can't scrub we can't scrub you can't scrub they can't scrub
V-ing form
I can't be scrubbing you can't be scrubbing she can't be scrubbing we can't be scrubbing you can't be scrubbing they can't be scrubbing
Perfect
I can't have scrubbed you can't have scrubbed she can't have scrubbed we can't have scrubbed you can't have scrubbed they can't have scrubbed
V-ing perfect
I can't have been scrubbing you can't have been scrubbing she can't have been scrubbing we can't have been scrubbing you can't have been scrubbing they can't have been scrubbing
Interrogative form
Simple form
can I scrub? can you scrub? can she scrub? can we scrub? can you scrub? can they scrub?
V-ing form
can I be scrubbing? can you be scrubbing? can she be scrubbing? can we be scrubbing? can you be scrubbing? can they be scrubbing?
Perfect
can I have scrubbed? can you have scrubbed? can she have scrubbed? can we have scrubbed? can you have scrubbed? can they have scrubbed?
V-ing perfect
can I have been scrubbing? can you have been scrubbing? can she have been scrubbing? can we have been scrubbing? can you have been scrubbing? can they have been scrubbing?
Interro-negative form
Simple form
can't I scrub? can't you scrub? can't she scrub? can't we scrub? can't you scrub? can't they scrub?
V-ing form
can't I be scrubbing? can't you be scrubbing? can't she be scrubbing? can't we be scrubbing? can't you be scrubbing? can't they be scrubbing?
Perfect
can't I have scrubbed? can't you have scrubbed? can't she have scrubbed? can't we have scrubbed? can't you have scrubbed? can't they have scrubbed?
V-ing perfect
can't I have been scrubbing? can't you have been scrubbing? can't she have been scrubbing? can't we have been scrubbing? can't you have been scrubbing? can't they have been scrubbing?