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 mayn't retrogress
you mayn't retrogress
he mayn't retrogress
we mayn't retrogress
you mayn't retrogress
they mayn't retrogress 	I mayn't be retrogressing
you mayn't be retrogressing
he mayn't be retrogressing
we mayn't be retrogressing
you mayn't be retrogressing
they mayn't be retrogressing	I mayn't have retrogressed
you mayn't have retrogressed
he mayn't have retrogressed
we mayn't have retrogressed
you mayn't have retrogressed
they mayn't have retrogressed	I mayn't have been retrogressing
you mayn't have been retrogressing
he mayn't have been retrogressing
we mayn't have been retrogressing
you mayn't have been retrogressing
they mayn't 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 	
mayn't I retrogress?
mayn't you retrogress?
mayn't he retrogress?
mayn't we retrogress?
mayn't you retrogress?
mayn't they retrogress? 	mayn't I be retrogressing?
mayn't you be retrogressing?
mayn't he be retrogressing?
mayn't we be retrogressing?
mayn't you be retrogressing?
mayn't they be retrogressing? 	mayn't I have retrogressed?
mayn't you have retrogressed?
mayn't he have retrogressed?
mayn't we have retrogressed?
mayn't you have retrogressed?
mayn't they have retrogressed? 	mayn't I have been retrogressing?
mayn't you have been retrogressing?
mayn't he have been retrogressing?
mayn't we have been retrogressing?
mayn't you have been retrogressing?
mayn't they have been retrogressing?