may prevent
Verbo regular: prevent - prevented- prevented

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I may prevent
you may prevent
he may prevent
we may prevent
you may prevent
they may prevent 	I may be preventing
you may be preventing
he may be preventing
we may be preventing
you may be preventing
they may be preventing	I may have prevented
you may have prevented
he may have prevented
we may have prevented
you may have prevented
they may have prevented	I may have been preventing
you may have been preventing
he may have been preventing
we may have been preventing
you may have been preventing
they may have been preventing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I may not prevent
you may not prevent
he may not prevent
we may not prevent
you may not prevent
they may not prevent 	I may not be preventing
you may not be preventing
he may not be preventing
we may not be preventing
you may not be preventing
they may not be preventing	I may not have prevented
you may not have prevented
he may not have prevented
we may not have prevented
you may not have prevented
they may not have prevented	I may not have been preventing
you may not have been preventing
he may not have been preventing
we may not have been preventing
you may not have been preventing
they may not have been preventing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
may I prevent?
may you prevent?
may he prevent?
may we prevent?
may you prevent?
may they prevent? 	may I be preventing?
may you be preventing?
may he be preventing?
may we be preventing?
may you be preventing?
may they be preventing? 	may I have prevented?
may you have prevented?
may he have prevented?
may we have prevented?
may you have prevented?
may they have prevented? 	may I have been preventing?
may you have been preventing?
may he have been preventing?
may we have been preventing?
may you have been preventing?
may they have been preventing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
may I not prevent?
may you not prevent?
may he not prevent?
may we not prevent?
may you not prevent?
may they not prevent? 	may I not be preventing?
may you not be preventing?
may he not be preventing?
may we not be preventing?
may you not be preventing?
may they not be preventing? 	may I not have prevented?
may you not have prevented?
may he not have prevented?
may we not have prevented?
may you not have prevented?
may they not have prevented? 	may I not have been preventing?
may you not have been preventing?
may he not have been preventing?
may we not have been preventing?
may you not have been preventing?
may they not have been preventing?