may decide
Regular verb: decide - decided- decided

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may decide
you may decide
she may decide
we may decide
you may decide
they may decide 	I may be deciding
you may be deciding
she may be deciding
we may be deciding
you may be deciding
they may be deciding	I may have decided
you may have decided
she may have decided
we may have decided
you may have decided
they may have decided	I may have been deciding
you may have been deciding
she may have been deciding
we may have been deciding
you may have been deciding
they may have been deciding	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't decide
you mayn't decide
she mayn't decide
we mayn't decide
you mayn't decide
they mayn't decide 	I mayn't be deciding
you mayn't be deciding
she mayn't be deciding
we mayn't be deciding
you mayn't be deciding
they mayn't be deciding	I mayn't have decided
you mayn't have decided
she mayn't have decided
we mayn't have decided
you mayn't have decided
they mayn't have decided	I mayn't have been deciding
you mayn't have been deciding
she mayn't have been deciding
we mayn't have been deciding
you mayn't have been deciding
they mayn't have been deciding	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I decide?
may you decide?
may she decide?
may we decide?
may you decide?
may they decide? 	may I be deciding?
may you be deciding?
may she be deciding?
may we be deciding?
may you be deciding?
may they be deciding? 	may I have decided?
may you have decided?
may she have decided?
may we have decided?
may you have decided?
may they have decided? 	may I have been deciding?
may you have been deciding?
may she have been deciding?
may we have been deciding?
may you have been deciding?
may they have been deciding? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I decide?
mayn't you decide?
mayn't she decide?
mayn't we decide?
mayn't you decide?
mayn't they decide? 	mayn't I be deciding?
mayn't you be deciding?
mayn't she be deciding?
mayn't we be deciding?
mayn't you be deciding?
mayn't they be deciding? 	mayn't I have decided?
mayn't you have decided?
mayn't she have decided?
mayn't we have decided?
mayn't you have decided?
mayn't they have decided? 	mayn't I have been deciding?
mayn't you have been deciding?
mayn't she have been deciding?
mayn't we have been deciding?
mayn't you have been deciding?
mayn't they have been deciding?