may stem
Verbo regular: stem - stemmed- stemmed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I may stem
you may stem
she may stem
we may stem
you may stem
they may stem 	I may be stemming
you may be stemming
she may be stemming
we may be stemming
you may be stemming
they may be stemming	I may have stemmed
you may have stemmed
she may have stemmed
we may have stemmed
you may have stemmed
they may have stemmed	I may have been stemming
you may have been stemming
she may have been stemming
we may have been stemming
you may have been stemming
they may have been stemming	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I may not stem
you may not stem
she may not stem
we may not stem
you may not stem
they may not stem 	I may not be stemming
you may not be stemming
she may not be stemming
we may not be stemming
you may not be stemming
they may not be stemming	I may not have stemmed
you may not have stemmed
she may not have stemmed
we may not have stemmed
you may not have stemmed
they may not have stemmed	I may not have been stemming
you may not have been stemming
she may not have been stemming
we may not have been stemming
you may not have been stemming
they may not have been stemming	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
may I stem?
may you stem?
may she stem?
may we stem?
may you stem?
may they stem? 	may I be stemming?
may you be stemming?
may she be stemming?
may we be stemming?
may you be stemming?
may they be stemming? 	may I have stemmed?
may you have stemmed?
may she have stemmed?
may we have stemmed?
may you have stemmed?
may they have stemmed? 	may I have been stemming?
may you have been stemming?
may she have been stemming?
may we have been stemming?
may you have been stemming?
may they have been stemming? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
may I not stem?
may you not stem?
may she not stem?
may we not stem?
may you not stem?
may they not stem? 	may I not be stemming?
may you not be stemming?
may she not be stemming?
may we not be stemming?
may you not be stemming?
may they not be stemming? 	may I not have stemmed?
may you not have stemmed?
may she not have stemmed?
may we not have stemmed?
may you not have stemmed?
may they not have stemmed? 	may I not have been stemming?
may you not have been stemming?
may she not have been stemming?
may we not have been stemming?
may you not have been stemming?
may they not have been stemming?