may clean
Regular verb: clean - cleaned- cleaned

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

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

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I clean?
may you clean?
may she clean?
may we clean?
may you clean?
may they clean? 	may I be cleaning?
may you be cleaning?
may she be cleaning?
may we be cleaning?
may you be cleaning?
may they be cleaning? 	may I have cleaned?
may you have cleaned?
may she 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 she 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 	
mayn't I clean?
mayn't you clean?
mayn't she clean?
mayn't we clean?
mayn't you clean?
mayn't they clean? 	mayn't I be cleaning?
mayn't you be cleaning?
mayn't she be cleaning?
mayn't we be cleaning?
mayn't you be cleaning?
mayn't they be cleaning? 	mayn't I have cleaned?
mayn't you have cleaned?
mayn't she have cleaned?
mayn't we have cleaned?
mayn't you have cleaned?
mayn't they have cleaned? 	mayn't I have been cleaning?
mayn't you have been cleaning?
mayn't she have been cleaning?
mayn't we have been cleaning?
mayn't you have been cleaning?
mayn't they have been cleaning?