shall lack
Regular verb: lack - lacked- lacked

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shall lack
you shall lack
she shall lack
we shall lack
you shall lack
they shall lack 	I shall be lacking
you shall be lacking
she shall be lacking
we shall be lacking
you shall be lacking
they shall be lacking	I shall have lacked
you shall have lacked
she shall have lacked
we shall have lacked
you shall have lacked
they shall have lacked	I shall have been lacking
you shall have been lacking
she shall have been lacking
we shall have been lacking
you shall have been lacking
they shall have been lacking	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shall not lack
you shall not lack
she shall not lack
we shall not lack
you shall not lack
they shall not lack 	I shall not be lacking
you shall not be lacking
she shall not be lacking
we shall not be lacking
you shall not be lacking
they shall not be lacking	I shall not have lacked
you shall not have lacked
she shall not have lacked
we shall not have lacked
you shall not have lacked
they shall not have lacked	I shall not have been lacking
you shall not have been lacking
she shall not have been lacking
we shall not have been lacking
you shall not have been lacking
they shall not have been lacking	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shall I lack?
shall you lack?
shall she lack?
shall we lack?
shall you lack?
shall they lack? 	shall I be lacking?
shall you be lacking?
shall she be lacking?
shall we be lacking?
shall you be lacking?
shall they be lacking? 	shall I have lacked?
shall you have lacked?
shall she have lacked?
shall we have lacked?
shall you have lacked?
shall they have lacked? 	shall I have been lacking?
shall you have been lacking?
shall she have been lacking?
shall we have been lacking?
shall you have been lacking?
shall they have been lacking? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shall I not lack?
shall you not lack?
shall she not lack?
shall we not lack?
shall you not lack?
shall they not lack? 	shall I not be lacking?
shall you not be lacking?
shall she not be lacking?
shall we not be lacking?
shall you not be lacking?
shall they not be lacking? 	shall I not have lacked?
shall you not have lacked?
shall she not have lacked?
shall we not have lacked?
shall you not have lacked?
shall they not have lacked? 	shall I not have been lacking?
shall you not have been lacking?
shall she not have been lacking?
shall we not have been lacking?
shall you not have been lacking?
shall they not have been lacking?