must crumble
Regelmä&szlig;iges Verb: crumble - crumbled- crumbled

Bestätigung 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I must crumble
you must crumble
she must crumble
we must crumble
you must crumble
they must crumble 	I must be crumbling
you must be crumbling
she must be crumbling
we must be crumbling
you must be crumbling
they must be crumbling	I must have crumbled
you must have crumbled
she must have crumbled
we must have crumbled
you must have crumbled
they must have crumbled	I must have been crumbling
you must have been crumbling
she must have been crumbling
we must have been crumbling
you must have been crumbling
they must have been crumbling	

Negation 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I must not crumble
you must not crumble
she must not crumble
we must not crumble
you must not crumble
they must not crumble 	I must not be crumbling
you must not be crumbling
she must not be crumbling
we must not be crumbling
you must not be crumbling
they must not be crumbling	I must not have crumbled
you must not have crumbled
she must not have crumbled
we must not have crumbled
you must not have crumbled
they must not have crumbled	I must not have been crumbling
you must not have been crumbling
she must not have been crumbling
we must not have been crumbling
you must not have been crumbling
they must not have been crumbling	

Fragende Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
must I crumble?
must you crumble?
must she crumble?
must we crumble?
must you crumble?
must they crumble? 	must I be crumbling?
must you be crumbling?
must she be crumbling?
must we be crumbling?
must you be crumbling?
must they be crumbling? 	must I have crumbled?
must you have crumbled?
must she have crumbled?
must we have crumbled?
must you have crumbled?
must they have crumbled? 	must I have been crumbling?
must you have been crumbling?
must she have been crumbling?
must we have been crumbling?
must you have been crumbling?
must they have been crumbling? 	

Fragende Negation Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
must I not crumble?
must you not crumble?
must she not crumble?
must we not crumble?
must you not crumble?
must they not crumble? 	must I not be crumbling?
must you not be crumbling?
must she not be crumbling?
must we not be crumbling?
must you not be crumbling?
must they not be crumbling? 	must I not have crumbled?
must you not have crumbled?
must she not have crumbled?
must we not have crumbled?
must you not have crumbled?
must they not have crumbled? 	must I not have been crumbling?
must you not have been crumbling?
must she not have been crumbling?
must we not have been crumbling?
must you not have been crumbling?
must they not have been crumbling?