I shall preascertain you shall preascertain he shall preascertain we shall preascertain you shall preascertain they shall preascertain
V-ing form
I shall be preascertaining you shall be preascertaining he shall be preascertaining we shall be preascertaining you shall be preascertaining they shall be preascertaining
Perfect
I shall have preascertained you shall have preascertained he shall have preascertained we shall have preascertained you shall have preascertained they shall have preascertained
V-ing perfect
I shall have been preascertaining you shall have been preascertaining he shall have been preascertaining we shall have been preascertaining you shall have been preascertaining they shall have been preascertaining
Negation
Simple form
I shall not preascertain you shall not preascertain he shall not preascertain we shall not preascertain you shall not preascertain they shall not preascertain
V-ing form
I shall not be preascertaining you shall not be preascertaining he shall not be preascertaining we shall not be preascertaining you shall not be preascertaining they shall not be preascertaining
Perfect
I shall not have preascertained you shall not have preascertained he shall not have preascertained we shall not have preascertained you shall not have preascertained they shall not have preascertained
V-ing perfect
I shall not have been preascertaining you shall not have been preascertaining he shall not have been preascertaining we shall not have been preascertaining you shall not have been preascertaining they shall not 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
shall I not preascertain? shall you not preascertain? shall he not preascertain? shall we not preascertain? shall you not preascertain? shall they not preascertain?
V-ing form
shall I not be preascertaining? shall you not be preascertaining? shall he not be preascertaining? shall we not be preascertaining? shall you not be preascertaining? shall they not be preascertaining?
Perfect
shall I not have preascertained? shall you not have preascertained? shall he not have preascertained? shall we not have preascertained? shall you not have preascertained? shall they not have preascertained?
V-ing perfect
shall I not have been preascertaining? shall you not have been preascertaining? shall he not have been preascertaining? shall we not have been preascertaining? shall you not have been preascertaining? shall they not have been preascertaining?