can clean
Regular verb: clean - cleaned- cleaned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can clean
you can clean
she can clean
we can clean
you can clean
they can clean 	I can be cleaning
you can be cleaning
she can be cleaning
we can be cleaning
you can be cleaning
they can be cleaning	I can have cleaned
you can have cleaned
she can have cleaned
we can have cleaned
you can have cleaned
they can have cleaned	I can have been cleaning
you can have been cleaning
she can have been cleaning
we can have been cleaning
you can have been cleaning
they can have been cleaning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I cannot clean
you cannot clean
she cannot clean
we cannot clean
you cannot clean
they cannot clean 	I cannot be cleaning
you cannot be cleaning
she cannot be cleaning
we cannot be cleaning
you cannot be cleaning
they cannot be cleaning	I cannot have cleaned
you cannot have cleaned
she cannot have cleaned
we cannot have cleaned
you cannot have cleaned
they cannot have cleaned	I cannot have been cleaning
you cannot have been cleaning
she cannot have been cleaning
we cannot have been cleaning
you cannot have been cleaning
they cannot have been cleaning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I clean?
can you clean?
can she clean?
can we clean?
can you clean?
can they clean? 	can I be cleaning?
can you be cleaning?
can she be cleaning?
can we be cleaning?
can you be cleaning?
can they be cleaning? 	can I have cleaned?
can you have cleaned?
can she have cleaned?
can we have cleaned?
can you have cleaned?
can they have cleaned? 	can I have been cleaning?
can you have been cleaning?
can she have been cleaning?
can we have been cleaning?
can you have been cleaning?
can they have been cleaning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I not clean?
can you not clean?
can she not clean?
can we not clean?
can you not clean?
can they not clean? 	can I not be cleaning?
can you not be cleaning?
can she not be cleaning?
can we not be cleaning?
can you not be cleaning?
can they not be cleaning? 	can I not have cleaned?
can you not have cleaned?
can she not have cleaned?
can we not have cleaned?
can you not have cleaned?
can they not have cleaned? 	can I not have been cleaning?
can you not have been cleaning?
can she not have been cleaning?
can we not have been cleaning?
can you not have been cleaning?
can they not have been cleaning?