will crumble
Regular verb: crumble - crumbled- crumbled

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

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

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

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