must crumple
Verbo regolare: crumple - crumpled- crumpled

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I must crumple
you must crumple
he must crumple
we must crumple
you must crumple
they must crumple 	I must be crumpling
you must be crumpling
he must be crumpling
we must be crumpling
you must be crumpling
they must be crumpling	I must have crumpled
you must have crumpled
he must have crumpled
we must have crumpled
you must have crumpled
they must have crumpled	I must have been crumpling
you must have been crumpling
he must have been crumpling
we must have been crumpling
you must have been crumpling
they must have been crumpling	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I mustn't crumple
you mustn't crumple
he mustn't crumple
we mustn't crumple
you mustn't crumple
they mustn't crumple 	I mustn't be crumpling
you mustn't be crumpling
he mustn't be crumpling
we mustn't be crumpling
you mustn't be crumpling
they mustn't be crumpling	I mustn't have crumpled
you mustn't have crumpled
he mustn't have crumpled
we mustn't have crumpled
you mustn't have crumpled
they mustn't have crumpled	I mustn't have been crumpling
you mustn't have been crumpling
he mustn't have been crumpling
we mustn't have been crumpling
you mustn't have been crumpling
they mustn't have been crumpling	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
must I crumple?
must you crumple?
must he crumple?
must we crumple?
must you crumple?
must they crumple? 	must I be crumpling?
must you be crumpling?
must he be crumpling?
must we be crumpling?
must you be crumpling?
must they be crumpling? 	must I have crumpled?
must you have crumpled?
must he have crumpled?
must we have crumpled?
must you have crumpled?
must they have crumpled? 	must I have been crumpling?
must you have been crumpling?
must he have been crumpling?
must we have been crumpling?
must you have been crumpling?
must they have been crumpling? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
mustn't I crumple?
mustn't you crumple?
mustn't he crumple?
mustn't we crumple?
mustn't you crumple?
mustn't they crumple? 	mustn't I be crumpling?
mustn't you be crumpling?
mustn't he be crumpling?
mustn't we be crumpling?
mustn't you be crumpling?
mustn't they be crumpling? 	mustn't I have crumpled?
mustn't you have crumpled?
mustn't he have crumpled?
mustn't we have crumpled?
mustn't you have crumpled?
mustn't they have crumpled? 	mustn't I have been crumpling?
mustn't you have been crumpling?
mustn't he have been crumpling?
mustn't we have been crumpling?
mustn't you have been crumpling?
mustn't they have been crumpling?