I'll be preascertaining you'll be preascertaining he'll be preascertaining we'll be preascertaining you'll be preascertaining they'll be preascertaining
Perfect
I'll have preascertained you'll have preascertained he'll have preascertained we'll have preascertained you'll have preascertained they'll have preascertained
V-ing perfect
I'll have been preascertaining you'll have been preascertaining he'll have been preascertaining we'll have been preascertaining you'll have been preascertaining they'll have been preascertaining
Negation
Simple form
I shan't preascertain you shan't preascertain he shan't preascertain we shan't preascertain you shan't preascertain they shan't preascertain
V-ing form
I shan't be preascertaining you shan't be preascertaining he shan't be preascertaining we shan't be preascertaining you shan't be preascertaining they shan't be preascertaining
Perfect
I shan't have preascertained you shan't have preascertained he shan't have preascertained we shan't have preascertained you shan't have preascertained they shan't have preascertained
V-ing perfect
I shan't have been preascertaining you shan't have been preascertaining he shan't have been preascertaining we shan't have been preascertaining you shan't have been preascertaining they shan't have been preascertaining
Interrogative form
Simple form
shall I preascertain? shall you preascertain? shall he preascertain? shall we preascertain? shall you preascertain? shall they preascertain?
V-ing form
shall I be preascertaining? shall you be preascertaining? shall he be preascertaining? shall we be preascertaining? shall you be preascertaining? shall they be preascertaining?
Perfect
shall I have preascertained? shall you have preascertained? shall he have preascertained? shall we have preascertained? shall you have preascertained? shall they have preascertained?
V-ing perfect
shall I have been preascertaining? shall you have been preascertaining? shall he have been preascertaining? shall we have been preascertaining? shall you have been preascertaining? shall they have been preascertaining?
Interro-negative form
Simple form
shan't I preascertain? shan't you preascertain? shan't he preascertain? shan't we preascertain? shan't you preascertain? shan't they preascertain?
V-ing form
shan't I be preascertaining? shan't you be preascertaining? shan't he be preascertaining? shan't we be preascertaining? shan't you be preascertaining? shan't they be preascertaining?
Perfect
shan't I have preascertained? shan't you have preascertained? shan't he have preascertained? shan't we have preascertained? shan't you have preascertained? shan't they have preascertained?
V-ing perfect
shan't I have been preascertaining? shan't you have been preascertaining? shan't he have been preascertaining? shan't we have been preascertaining? shan't you have been preascertaining? shan't they have been preascertaining?