can scrub
Regular verb: scrub - scrubbed- scrubbed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can scrub
you can scrub
he can scrub
we can scrub
you can scrub
they can scrub 	I can be scrubbing
you can be scrubbing
he can be scrubbing
we can be scrubbing
you can be scrubbing
they can be scrubbing	I can have scrubbed
you can have scrubbed
he can have scrubbed
we can have scrubbed
you can have scrubbed
they can have scrubbed	I can have been scrubbing
you can have been scrubbing
he can have been scrubbing
we can have been scrubbing
you can have been scrubbing
they can have been scrubbing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot scrub
you cannot scrub
he cannot scrub
we cannot scrub
you cannot scrub
they cannot scrub 	I cannot be scrubbing
you cannot be scrubbing
he cannot be scrubbing
we cannot be scrubbing
you cannot be scrubbing
they cannot be scrubbing	I cannot have scrubbed
you cannot have scrubbed
he cannot have scrubbed
we cannot have scrubbed
you cannot have scrubbed
they cannot have scrubbed	I cannot have been scrubbing
you cannot have been scrubbing
he cannot have been scrubbing
we cannot have been scrubbing
you cannot have been scrubbing
they cannot have been scrubbing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I scrub?
can you scrub?
can he scrub?
can we scrub?
can you scrub?
can they scrub? 	can I be scrubbing?
can you be scrubbing?
can he be scrubbing?
can we be scrubbing?
can you be scrubbing?
can they be scrubbing? 	can I have scrubbed?
can you have scrubbed?
can he have scrubbed?
can we have scrubbed?
can you have scrubbed?
can they have scrubbed? 	can I have been scrubbing?
can you have been scrubbing?
can he have been scrubbing?
can we have been scrubbing?
can you have been scrubbing?
can they have been scrubbing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not scrub?
can you not scrub?
can he not scrub?
can we not scrub?
can you not scrub?
can they not scrub? 	can I not be scrubbing?
can you not be scrubbing?
can he not be scrubbing?
can we not be scrubbing?
can you not be scrubbing?
can they not be scrubbing? 	can I not have scrubbed?
can you not have scrubbed?
can he not have scrubbed?
can we not have scrubbed?
can you not have scrubbed?
can they not have scrubbed? 	can I not have been scrubbing?
can you not have been scrubbing?
can he not have been scrubbing?
can we not have been scrubbing?
can you not have been scrubbing?
can they not have been scrubbing?