may preinstall
Regular verb: preinstall - preinstalled- preinstalled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may preinstall
you may preinstall
she may preinstall
we may preinstall
you may preinstall
they may preinstall 	I may be preinstalling
you may be preinstalling
she may be preinstalling
we may be preinstalling
you may be preinstalling
they may be preinstalling	I may have preinstalled
you may have preinstalled
she may have preinstalled
we may have preinstalled
you may have preinstalled
they may have preinstalled	I may have been preinstalling
you may have been preinstalling
she may have been preinstalling
we may have been preinstalling
you may have been preinstalling
they may have been preinstalling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't preinstall
you mayn't preinstall
she mayn't preinstall
we mayn't preinstall
you mayn't preinstall
they mayn't preinstall 	I mayn't be preinstalling
you mayn't be preinstalling
she mayn't be preinstalling
we mayn't be preinstalling
you mayn't be preinstalling
they mayn't be preinstalling	I mayn't have preinstalled
you mayn't have preinstalled
she mayn't have preinstalled
we mayn't have preinstalled
you mayn't have preinstalled
they mayn't have preinstalled	I mayn't have been preinstalling
you mayn't have been preinstalling
she mayn't have been preinstalling
we mayn't have been preinstalling
you mayn't have been preinstalling
they mayn't have been preinstalling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I preinstall?
may you preinstall?
may she preinstall?
may we preinstall?
may you preinstall?
may they preinstall? 	may I be preinstalling?
may you be preinstalling?
may she be preinstalling?
may we be preinstalling?
may you be preinstalling?
may they be preinstalling? 	may I have preinstalled?
may you have preinstalled?
may she have preinstalled?
may we have preinstalled?
may you have preinstalled?
may they have preinstalled? 	may I have been preinstalling?
may you have been preinstalling?
may she have been preinstalling?
may we have been preinstalling?
may you have been preinstalling?
may they have been preinstalling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I preinstall?
mayn't you preinstall?
mayn't she preinstall?
mayn't we preinstall?
mayn't you preinstall?
mayn't they preinstall? 	mayn't I be preinstalling?
mayn't you be preinstalling?
mayn't she be preinstalling?
mayn't we be preinstalling?
mayn't you be preinstalling?
mayn't they be preinstalling? 	mayn't I have preinstalled?
mayn't you have preinstalled?
mayn't she have preinstalled?
mayn't we have preinstalled?
mayn't you have preinstalled?
mayn't they have preinstalled? 	mayn't I have been preinstalling?
mayn't you have been preinstalling?
mayn't she have been preinstalling?
mayn't we have been preinstalling?
mayn't you have been preinstalling?
mayn't they have been preinstalling?