may retrogress
Verbo regular: retrogress - retrogressed- retrogressed

Afirmação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I may retrogress
you may retrogress
he may retrogress
we may retrogress
you may retrogress
they may retrogress 	I may be retrogressing
you may be retrogressing
he may be retrogressing
we may be retrogressing
you may be retrogressing
they may be retrogressing	I may have retrogressed
you may have retrogressed
he may have retrogressed
we may have retrogressed
you may have retrogressed
they may have retrogressed	I may have been retrogressing
you may have been retrogressing
he may have been retrogressing
we may have been retrogressing
you may have been retrogressing
they may have been retrogressing	

Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
I may not retrogress
you may not retrogress
he may not retrogress
we may not retrogress
you may not retrogress
they may not retrogress 	I may not be retrogressing
you may not be retrogressing
he may not be retrogressing
we may not be retrogressing
you may not be retrogressing
they may not be retrogressing	I may not have retrogressed
you may not have retrogressed
he may not have retrogressed
we may not have retrogressed
you may not have retrogressed
they may not have retrogressed	I may not have been retrogressing
you may not have been retrogressing
he may not have been retrogressing
we may not have been retrogressing
you may not have been retrogressing
they may not have been retrogressing	

Forma interrogativa 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
may I retrogress?
may you retrogress?
may he retrogress?
may we retrogress?
may you retrogress?
may they retrogress? 	may I be retrogressing?
may you be retrogressing?
may he be retrogressing?
may we be retrogressing?
may you be retrogressing?
may they be retrogressing? 	may I have retrogressed?
may you have retrogressed?
may he have retrogressed?
may we have retrogressed?
may you have retrogressed?
may they have retrogressed? 	may I have been retrogressing?
may you have been retrogressing?
may he have been retrogressing?
may we have been retrogressing?
may you have been retrogressing?
may they have been retrogressing? 	

Forma interro-Negação 	
Forma simple 	Forma com V-ing 	Perfeito 	Perfeito com V-ing 	
may I not retrogress?
may you not retrogress?
may he not retrogress?
may we not retrogress?
may you not retrogress?
may they not retrogress? 	may I not be retrogressing?
may you not be retrogressing?
may he not be retrogressing?
may we not be retrogressing?
may you not be retrogressing?
may they not be retrogressing? 	may I not have retrogressed?
may you not have retrogressed?
may he not have retrogressed?
may we not have retrogressed?
may you not have retrogressed?
may they not have retrogressed? 	may I not have been retrogressing?
may you not have been retrogressing?
may he not have been retrogressing?
may we not have been retrogressing?
may you not have been retrogressing?
may they not have been retrogressing?