shall crumble
Regular verb: crumble - crumbled- crumbled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shall crumble
you shall crumble
she shall crumble
we shall crumble
you shall crumble
they shall crumble 	I shall be crumbling
you shall be crumbling
she shall be crumbling
we shall be crumbling
you shall be crumbling
they shall be crumbling	I shall have crumbled
you shall have crumbled
she shall have crumbled
we shall have crumbled
you shall have crumbled
they shall have crumbled	I shall have been crumbling
you shall have been crumbling
she shall have been crumbling
we shall have been crumbling
you shall have been crumbling
they shall have been crumbling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shall not crumble
you shall not crumble
she shall not crumble
we shall not crumble
you shall not crumble
they shall not crumble 	I shall not be crumbling
you shall not be crumbling
she shall not be crumbling
we shall not be crumbling
you shall not be crumbling
they shall not be crumbling	I shall not have crumbled
you shall not have crumbled
she shall not have crumbled
we shall not have crumbled
you shall not have crumbled
they shall not have crumbled	I shall not have been crumbling
you shall not have been crumbling
she shall not have been crumbling
we shall not have been crumbling
you shall not have been crumbling
they shall not have been crumbling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shall I crumble?
shall you crumble?
shall she crumble?
shall we crumble?
shall you crumble?
shall they crumble? 	shall I be crumbling?
shall you be crumbling?
shall she be crumbling?
shall we be crumbling?
shall you be crumbling?
shall they be crumbling? 	shall I have crumbled?
shall you have crumbled?
shall she have crumbled?
shall we have crumbled?
shall you have crumbled?
shall they have crumbled? 	shall I have been crumbling?
shall you have been crumbling?
shall she have been crumbling?
shall we have been crumbling?
shall you have been crumbling?
shall they have been crumbling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shall I not crumble?
shall you not crumble?
shall she not crumble?
shall we not crumble?
shall you not crumble?
shall they not crumble? 	shall I not be crumbling?
shall you not be crumbling?
shall she not be crumbling?
shall we not be crumbling?
shall you not be crumbling?
shall they not be crumbling? 	shall I not have crumbled?
shall you not have crumbled?
shall she not have crumbled?
shall we not have crumbled?
shall you not have crumbled?
shall they not have crumbled? 	shall I not have been crumbling?
shall you not have been crumbling?
shall she not have been crumbling?
shall we not have been crumbling?
shall you not have been crumbling?
shall they not have been crumbling?