shall preascertain
Regular verb: preascertain - preascertained- preascertained

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I'll preascertain
you'll preascertain
she'll preascertain
we'll preascertain
you'll preascertain
they'll preascertain 	I'll be preascertaining
you'll be preascertaining
she'll be preascertaining
we'll be preascertaining
you'll be preascertaining
they'll be preascertaining	I'll have preascertained
you'll have preascertained
she'll have preascertained
we'll have preascertained
you'll have preascertained
they'll have preascertained	I'll have been preascertaining
you'll have been preascertaining
she'll have been preascertaining
we'll have been preascertaining
you'll have been preascertaining
they'll have been preascertaining	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shan't preascertain
you shan't preascertain
she shan't preascertain
we shan't preascertain
you shan't preascertain
they shan't preascertain 	I shan't be preascertaining
you shan't be preascertaining
she shan't be preascertaining
we shan't be preascertaining
you shan't be preascertaining
they shan't be preascertaining	I shan't have preascertained
you shan't have preascertained
she shan't have preascertained
we shan't have preascertained
you shan't have preascertained
they shan't have preascertained	I shan't have been preascertaining
you shan't have been preascertaining
she 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 	V-ing form 	Perfect 	V-ing perfect 	
shall I preascertain?
shall you preascertain?
shall she preascertain?
shall we preascertain?
shall you preascertain?
shall they preascertain? 	shall I be preascertaining?
shall you be preascertaining?
shall she be preascertaining?
shall we be preascertaining?
shall you be preascertaining?
shall they be preascertaining? 	shall I have preascertained?
shall you have preascertained?
shall she have preascertained?
shall we have preascertained?
shall you have preascertained?
shall they have preascertained? 	shall I have been preascertaining?
shall you have been preascertaining?
shall she have been preascertaining?
shall we have been preascertaining?
shall you have been preascertaining?
shall they have been preascertaining? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shan't I preascertain?
shan't you preascertain?
shan't she preascertain?
shan't we preascertain?
shan't you preascertain?
shan't they preascertain? 	shan't I be preascertaining?
shan't you be preascertaining?
shan't she be preascertaining?
shan't we be preascertaining?
shan't you be preascertaining?
shan't they be preascertaining? 	shan't I have preascertained?
shan't you have preascertained?
shan't she have preascertained?
shan't we have preascertained?
shan't you have preascertained?
shan't they have preascertained? 	shan't I have been preascertaining?
shan't you have been preascertaining?
shan't she have been preascertaining?
shan't we have been preascertaining?
shan't you have been preascertaining?
shan't they have been preascertaining?