may weaken
Verbo regular: weaken - weakened- weakened

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I may weaken
you may weaken
she may weaken
we may weaken
you may weaken
they may weaken 	I may be weakening
you may be weakening
she may be weakening
we may be weakening
you may be weakening
they may be weakening	I may have weakened
you may have weakened
she may have weakened
we may have weakened
you may have weakened
they may have weakened	I may have been weakening
you may have been weakening
she may have been weakening
we may have been weakening
you may have been weakening
they may have been weakening	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mayn't weaken
you mayn't weaken
she mayn't weaken
we mayn't weaken
you mayn't weaken
they mayn't weaken 	I mayn't be weakening
you mayn't be weakening
she mayn't be weakening
we mayn't be weakening
you mayn't be weakening
they mayn't be weakening	I mayn't have weakened
you mayn't have weakened
she mayn't have weakened
we mayn't have weakened
you mayn't have weakened
they mayn't have weakened	I mayn't have been weakening
you mayn't have been weakening
she mayn't have been weakening
we mayn't have been weakening
you mayn't have been weakening
they mayn't have been weakening	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
may I weaken?
may you weaken?
may she weaken?
may we weaken?
may you weaken?
may they weaken? 	may I be weakening?
may you be weakening?
may she be weakening?
may we be weakening?
may you be weakening?
may they be weakening? 	may I have weakened?
may you have weakened?
may she have weakened?
may we have weakened?
may you have weakened?
may they have weakened? 	may I have been weakening?
may you have been weakening?
may she have been weakening?
may we have been weakening?
may you have been weakening?
may they have been weakening? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mayn't I weaken?
mayn't you weaken?
mayn't she weaken?
mayn't we weaken?
mayn't you weaken?
mayn't they weaken? 	mayn't I be weakening?
mayn't you be weakening?
mayn't she be weakening?
mayn't we be weakening?
mayn't you be weakening?
mayn't they be weakening? 	mayn't I have weakened?
mayn't you have weakened?
mayn't she have weakened?
mayn't we have weakened?
mayn't you have weakened?
mayn't they have weakened? 	mayn't I have been weakening?
mayn't you have been weakening?
mayn't she have been weakening?
mayn't we have been weakening?
mayn't you have been weakening?
mayn't they have been weakening?