may preweigh
Regular verb: preweigh - preweighed- preweighed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I may preweigh
you may preweigh
he may preweigh
we may preweigh
you may preweigh
they may preweigh 	I may be preweighing
you may be preweighing
he may be preweighing
we may be preweighing
you may be preweighing
they may be preweighing	I may have preweighed
you may have preweighed
he may have preweighed
we may have preweighed
you may have preweighed
they may have preweighed	I may have been preweighing
you may have been preweighing
he may have been preweighing
we may have been preweighing
you may have been preweighing
they may have been preweighing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mayn't preweigh
you mayn't preweigh
he mayn't preweigh
we mayn't preweigh
you mayn't preweigh
they mayn't preweigh 	I mayn't be preweighing
you mayn't be preweighing
he mayn't be preweighing
we mayn't be preweighing
you mayn't be preweighing
they mayn't be preweighing	I mayn't have preweighed
you mayn't have preweighed
he mayn't have preweighed
we mayn't have preweighed
you mayn't have preweighed
they mayn't have preweighed	I mayn't have been preweighing
you mayn't have been preweighing
he mayn't have been preweighing
we mayn't have been preweighing
you mayn't have been preweighing
they mayn't have been preweighing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
may I preweigh?
may you preweigh?
may he preweigh?
may we preweigh?
may you preweigh?
may they preweigh? 	may I be preweighing?
may you be preweighing?
may he be preweighing?
may we be preweighing?
may you be preweighing?
may they be preweighing? 	may I have preweighed?
may you have preweighed?
may he have preweighed?
may we have preweighed?
may you have preweighed?
may they have preweighed? 	may I have been preweighing?
may you have been preweighing?
may he have been preweighing?
may we have been preweighing?
may you have been preweighing?
may they have been preweighing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mayn't I preweigh?
mayn't you preweigh?
mayn't he preweigh?
mayn't we preweigh?
mayn't you preweigh?
mayn't they preweigh? 	mayn't I be preweighing?
mayn't you be preweighing?
mayn't he be preweighing?
mayn't we be preweighing?
mayn't you be preweighing?
mayn't they be preweighing? 	mayn't I have preweighed?
mayn't you have preweighed?
mayn't he have preweighed?
mayn't we have preweighed?
mayn't you have preweighed?
mayn't they have preweighed? 	mayn't I have been preweighing?
mayn't you have been preweighing?
mayn't he have been preweighing?
mayn't we have been preweighing?
mayn't you have been preweighing?
mayn't they have been preweighing?