may ascertain
Verbe régulier : ascertain - ascertained- ascertained
Traduction française : établir - constater 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I may ascertain
you may ascertain
he may ascertain
we may ascertain
you may ascertain
they may ascertain 	I may be ascertaining
you may be ascertaining
he may be ascertaining
we may be ascertaining
you may be ascertaining
they may be ascertaining	I may have ascertained
you may have ascertained
he may have ascertained
we may have ascertained
you may have ascertained
they may have ascertained	I may have been ascertaining
you may have been ascertaining
he may have been ascertaining
we may have been ascertaining
you may have been ascertaining
they may have been ascertaining	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mayn't ascertain
you mayn't ascertain
he mayn't ascertain
we mayn't ascertain
you mayn't ascertain
they mayn't ascertain 	I mayn't be ascertaining
you mayn't be ascertaining
he mayn't be ascertaining
we mayn't be ascertaining
you mayn't be ascertaining
they mayn't be ascertaining	I mayn't have ascertained
you mayn't have ascertained
he mayn't have ascertained
we mayn't have ascertained
you mayn't have ascertained
they mayn't have ascertained	I mayn't have been ascertaining
you mayn't have been ascertaining
he mayn't have been ascertaining
we mayn't have been ascertaining
you mayn't have been ascertaining
they mayn't have been ascertaining	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
may I ascertain?
may you ascertain?
may he ascertain?
may we ascertain?
may you ascertain?
may they ascertain? 	may I be ascertaining?
may you be ascertaining?
may he be ascertaining?
may we be ascertaining?
may you be ascertaining?
may they be ascertaining? 	may I have ascertained?
may you have ascertained?
may he have ascertained?
may we have ascertained?
may you have ascertained?
may they have ascertained? 	may I have been ascertaining?
may you have been ascertaining?
may he have been ascertaining?
may we have been ascertaining?
may you have been ascertaining?
may they have been ascertaining? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mayn't I ascertain?
mayn't you ascertain?
mayn't he ascertain?
mayn't we ascertain?
mayn't you ascertain?
mayn't they ascertain? 	mayn't I be ascertaining?
mayn't you be ascertaining?
mayn't he be ascertaining?
mayn't we be ascertaining?
mayn't you be ascertaining?
mayn't they be ascertaining? 	mayn't I have ascertained?
mayn't you have ascertained?
mayn't he have ascertained?
mayn't we have ascertained?
mayn't you have ascertained?
mayn't they have ascertained? 	mayn't I have been ascertaining?
mayn't you have been ascertaining?
mayn't he have been ascertaining?
mayn't we have been ascertaining?
mayn't you have been ascertaining?
mayn't they have been ascertaining?