may underuse
Verbo regular: underuse - underused- underused

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I may underuse
you may underuse
he may underuse
we may underuse
you may underuse
they may underuse 	I may be underusing
you may be underusing
he may be underusing
we may be underusing
you may be underusing
they may be underusing	I may have underused
you may have underused
he may have underused
we may have underused
you may have underused
they may have underused	I may have been underusing
you may have been underusing
he may have been underusing
we may have been underusing
you may have been underusing
they may have been underusing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I mayn't underuse
you mayn't underuse
he mayn't underuse
we mayn't underuse
you mayn't underuse
they mayn't underuse 	I mayn't be underusing
you mayn't be underusing
he mayn't be underusing
we mayn't be underusing
you mayn't be underusing
they mayn't be underusing	I mayn't have underused
you mayn't have underused
he mayn't have underused
we mayn't have underused
you mayn't have underused
they mayn't have underused	I mayn't have been underusing
you mayn't have been underusing
he mayn't have been underusing
we mayn't have been underusing
you mayn't have been underusing
they mayn't have been underusing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
may I underuse?
may you underuse?
may he underuse?
may we underuse?
may you underuse?
may they underuse? 	may I be underusing?
may you be underusing?
may he be underusing?
may we be underusing?
may you be underusing?
may they be underusing? 	may I have underused?
may you have underused?
may he have underused?
may we have underused?
may you have underused?
may they have underused? 	may I have been underusing?
may you have been underusing?
may he have been underusing?
may we have been underusing?
may you have been underusing?
may they have been underusing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
mayn't I underuse?
mayn't you underuse?
mayn't he underuse?
mayn't we underuse?
mayn't you underuse?
mayn't they underuse? 	mayn't I be underusing?
mayn't you be underusing?
mayn't he be underusing?
mayn't we be underusing?
mayn't you be underusing?
mayn't they be underusing? 	mayn't I have underused?
mayn't you have underused?
mayn't he have underused?
mayn't we have underused?
mayn't you have underused?
mayn't they have underused? 	mayn't I have been underusing?
mayn't you have been underusing?
mayn't he have been underusing?
mayn't we have been underusing?
mayn't you have been underusing?
mayn't they have been underusing?