must deteriorate
Regelmä&szlig;iges Verb: deteriorate - deteriorated- deteriorated

Bestätigung 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I must deteriorate
you must deteriorate
she must deteriorate
we must deteriorate
you must deteriorate
they must deteriorate 	I must be deteriorating
you must be deteriorating
she must be deteriorating
we must be deteriorating
you must be deteriorating
they must be deteriorating	I must have deteriorated
you must have deteriorated
she must have deteriorated
we must have deteriorated
you must have deteriorated
they must have deteriorated	I must have been deteriorating
you must have been deteriorating
she must have been deteriorating
we must have been deteriorating
you must have been deteriorating
they must have been deteriorating	

Negation 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I mustn't deteriorate
you mustn't deteriorate
she mustn't deteriorate
we mustn't deteriorate
you mustn't deteriorate
they mustn't deteriorate 	I mustn't be deteriorating
you mustn't be deteriorating
she mustn't be deteriorating
we mustn't be deteriorating
you mustn't be deteriorating
they mustn't be deteriorating	I mustn't have deteriorated
you mustn't have deteriorated
she mustn't have deteriorated
we mustn't have deteriorated
you mustn't have deteriorated
they mustn't have deteriorated	I mustn't have been deteriorating
you mustn't have been deteriorating
she mustn't have been deteriorating
we mustn't have been deteriorating
you mustn't have been deteriorating
they mustn't have been deteriorating	

Fragende Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
must I deteriorate?
must you deteriorate?
must she deteriorate?
must we deteriorate?
must you deteriorate?
must they deteriorate? 	must I be deteriorating?
must you be deteriorating?
must she be deteriorating?
must we be deteriorating?
must you be deteriorating?
must they be deteriorating? 	must I have deteriorated?
must you have deteriorated?
must she have deteriorated?
must we have deteriorated?
must you have deteriorated?
must they have deteriorated? 	must I have been deteriorating?
must you have been deteriorating?
must she have been deteriorating?
must we have been deteriorating?
must you have been deteriorating?
must they have been deteriorating? 	

Fragende Negation Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
mustn't I deteriorate?
mustn't you deteriorate?
mustn't she deteriorate?
mustn't we deteriorate?
mustn't you deteriorate?
mustn't they deteriorate? 	mustn't I be deteriorating?
mustn't you be deteriorating?
mustn't she be deteriorating?
mustn't we be deteriorating?
mustn't you be deteriorating?
mustn't they be deteriorating? 	mustn't I have deteriorated?
mustn't you have deteriorated?
mustn't she have deteriorated?
mustn't we have deteriorated?
mustn't you have deteriorated?
mustn't they have deteriorated? 	mustn't I have been deteriorating?
mustn't you have been deteriorating?
mustn't she have been deteriorating?
mustn't we have been deteriorating?
mustn't you have been deteriorating?
mustn't they have been deteriorating?