English verb conjugation
MAY PREASCERTAIN

Regular verb: preascertain - preascertained - preascertained

Affirmation

Simple form	V-ing form
I may preascertain you may preascertain he may preascertain we may preascertain you may preascertain they may preascertain	I may be preascertaining you may be preascertaining he may be preascertaining we may be preascertaining you may be preascertaining they may be preascertaining
Perfect	V-ing perfect
I may have preascertained you may have preascertained he may have preascertained we may have preascertained you may have preascertained they may have preascertained	I may have been preascertaining you may have been preascertaining he may have been preascertaining we may have been preascertaining you may have been preascertaining they may have been preascertaining

Negation

Simple form	V-ing form
I mayn't preascertain you mayn't preascertain he mayn't preascertain we mayn't preascertain you mayn't preascertain they mayn't preascertain	I mayn't be preascertaining you mayn't be preascertaining he mayn't be preascertaining we mayn't be preascertaining you mayn't be preascertaining they mayn't be preascertaining
Perfect	V-ing perfect
I mayn't have preascertained you mayn't have preascertained he mayn't have preascertained we mayn't have preascertained you mayn't have preascertained they mayn't have preascertained	I mayn't have been preascertaining you mayn't have been preascertaining he mayn't have been preascertaining we mayn't have been preascertaining you mayn't have been preascertaining they mayn't have been preascertaining

Interrogative form

Simple form	V-ing form
may I preascertain? may you preascertain? may he preascertain? may we preascertain? may you preascertain? may they preascertain?	may I be preascertaining? may you be preascertaining? may he be preascertaining? may we be preascertaining? may you be preascertaining? may they be preascertaining?
Perfect	V-ing perfect
may I have preascertained? may you have preascertained? may he have preascertained? may we have preascertained? may you have preascertained? may they have preascertained?	may I have been preascertaining? may you have been preascertaining? may he have been preascertaining? may we have been preascertaining? may you have been preascertaining? may they have been preascertaining?

Interro-negative form

Simple form	V-ing form
mayn't I preascertain? mayn't you preascertain? mayn't he preascertain? mayn't we preascertain? mayn't you preascertain? mayn't they preascertain?	mayn't I be preascertaining? mayn't you be preascertaining? mayn't he be preascertaining? mayn't we be preascertaining? mayn't you be preascertaining? mayn't they be preascertaining?
Perfect	V-ing perfect
mayn't I have preascertained? mayn't you have preascertained? mayn't he have preascertained? mayn't we have preascertained? mayn't you have preascertained? mayn't they have preascertained?	mayn't I have been preascertaining? mayn't you have been preascertaining? mayn't he have been preascertaining? mayn't we have been preascertaining? mayn't you have been preascertaining? mayn't they have been preascertaining?