may install
Regular verb: install - installed- installed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may install
you may install
she may install
we may install
you may install
they may install 	I may be installing
you may be installing
she may be installing
we may be installing
you may be installing
they may be installing	I may have installed
you may have installed
she may have installed
we may have installed
you may have installed
they may have installed	I may have been installing
you may have been installing
she may have been installing
we may have been installing
you may have been installing
they may have been installing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't install
you mayn't install
she mayn't install
we mayn't install
you mayn't install
they mayn't install 	I mayn't be installing
you mayn't be installing
she mayn't be installing
we mayn't be installing
you mayn't be installing
they mayn't be installing	I mayn't have installed
you mayn't have installed
she mayn't have installed
we mayn't have installed
you mayn't have installed
they mayn't have installed	I mayn't have been installing
you mayn't have been installing
she mayn't have been installing
we mayn't have been installing
you mayn't have been installing
they mayn't have been installing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I install?
may you install?
may she install?
may we install?
may you install?
may they install? 	may I be installing?
may you be installing?
may she be installing?
may we be installing?
may you be installing?
may they be installing? 	may I have installed?
may you have installed?
may she have installed?
may we have installed?
may you have installed?
may they have installed? 	may I have been installing?
may you have been installing?
may she have been installing?
may we have been installing?
may you have been installing?
may they have been installing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I install?
mayn't you install?
mayn't she install?
mayn't we install?
mayn't you install?
mayn't they install? 	mayn't I be installing?
mayn't you be installing?
mayn't she be installing?
mayn't we be installing?
mayn't you be installing?
mayn't they be installing? 	mayn't I have installed?
mayn't you have installed?
mayn't she have installed?
mayn't we have installed?
mayn't you have installed?
mayn't they have installed? 	mayn't I have been installing?
mayn't you have been installing?
mayn't she have been installing?
mayn't we have been installing?
mayn't you have been installing?
mayn't they have been installing?