may clean
Regular verb: clean - cleaned- cleaned

Affirmation 	
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I may clean
you may clean
he may clean
we may clean
you may clean
they may clean 	I may be cleaning
you may be cleaning
he may be cleaning
we may be cleaning
you may be cleaning
they may be cleaning	I may have cleaned
you may have cleaned
he may have cleaned
we may have cleaned
you may have cleaned
they may have cleaned	I may have been cleaning
you may have been cleaning
he may have been cleaning
we may have been cleaning
you may have been cleaning
they may have been cleaning	

Negation 	
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I may not clean
you may not clean
he may not clean
we may not clean
you may not clean
they may not clean 	I may not be cleaning
you may not be cleaning
he may not be cleaning
we may not be cleaning
you may not be cleaning
they may not be cleaning	I may not have cleaned
you may not have cleaned
he may not have cleaned
we may not have cleaned
you may not have cleaned
they may not have cleaned	I may not have been cleaning
you may not have been cleaning
he may not have been cleaning
we may not have been cleaning
you may not have been cleaning
they may not have been cleaning	

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

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