shall ascertain
Regular verb: ascertain - ascertained- ascertained

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'll ascertain
you'll ascertain
he'll ascertain
we'll ascertain
you'll ascertain
they'll ascertain 	I'll be ascertaining
you'll be ascertaining
he'll be ascertaining
we'll be ascertaining
you'll be ascertaining
they'll be ascertaining	I'll have ascertained
you'll have ascertained
he'll have ascertained
we'll have ascertained
you'll have ascertained
they'll have ascertained	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 	V-ing form 	Perfect 	V-ing perfect 	
I shan't ascertain
you shan't ascertain
he shan't ascertain
we shan't ascertain
you shan't ascertain
they shan't ascertain 	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	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	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 	V-ing form 	Perfect 	V-ing perfect 	
shall I ascertain?
shall you ascertain?
shall he ascertain?
shall we ascertain?
shall you ascertain?
shall they ascertain? 	shall I be ascertaining?
shall you be ascertaining?
shall he be ascertaining?
shall we be ascertaining?
shall you be ascertaining?
shall they be ascertaining? 	shall I have ascertained?
shall you have ascertained?
shall he have ascertained?
shall we have ascertained?
shall you have ascertained?
shall they have ascertained? 	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 	V-ing form 	Perfect 	V-ing perfect 	
shan't I ascertain?
shan't you ascertain?
shan't he ascertain?
shan't we ascertain?
shan't you ascertain?
shan't they ascertain? 	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? 	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? 	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?