may whiten
Regular verb: whiten - whitened- whitened

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may whiten
you may whiten
she may whiten
we may whiten
you may whiten
they may whiten 	I may be whitening
you may be whitening
she may be whitening
we may be whitening
you may be whitening
they may be whitening	I may have whitened
you may have whitened
she may have whitened
we may have whitened
you may have whitened
they may have whitened	I may have been whitening
you may have been whitening
she may have been whitening
we may have been whitening
you may have been whitening
they may have been whitening	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't whiten
you mayn't whiten
she mayn't whiten
we mayn't whiten
you mayn't whiten
they mayn't whiten 	I mayn't be whitening
you mayn't be whitening
she mayn't be whitening
we mayn't be whitening
you mayn't be whitening
they mayn't be whitening	I mayn't have whitened
you mayn't have whitened
she mayn't have whitened
we mayn't have whitened
you mayn't have whitened
they mayn't have whitened	I mayn't have been whitening
you mayn't have been whitening
she mayn't have been whitening
we mayn't have been whitening
you mayn't have been whitening
they mayn't have been whitening	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I whiten?
may you whiten?
may she whiten?
may we whiten?
may you whiten?
may they whiten? 	may I be whitening?
may you be whitening?
may she be whitening?
may we be whitening?
may you be whitening?
may they be whitening? 	may I have whitened?
may you have whitened?
may she have whitened?
may we have whitened?
may you have whitened?
may they have whitened? 	may I have been whitening?
may you have been whitening?
may she have been whitening?
may we have been whitening?
may you have been whitening?
may they have been whitening? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I whiten?
mayn't you whiten?
mayn't she whiten?
mayn't we whiten?
mayn't you whiten?
mayn't they whiten? 	mayn't I be whitening?
mayn't you be whitening?
mayn't she be whitening?
mayn't we be whitening?
mayn't you be whitening?
mayn't they be whitening? 	mayn't I have whitened?
mayn't you have whitened?
mayn't she have whitened?
mayn't we have whitened?
mayn't you have whitened?
mayn't they have whitened? 	mayn't I have been whitening?
mayn't you have been whitening?
mayn't she have been whitening?
mayn't we have been whitening?
mayn't you have been whitening?
mayn't they have been whitening?