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