must occur
Regelmä&szlig;iges Verb: occur - occurred- occurred

Bestätigung 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I must occur
you must occur
she must occur
we must occur
you must occur
they must occur 	I must be occurring
you must be occurring
she must be occurring
we must be occurring
you must be occurring
they must be occurring	I must have occurred
you must have occurred
she must have occurred
we must have occurred
you must have occurred
they must have occurred	I must have been occurring
you must have been occurring
she must have been occurring
we must have been occurring
you must have been occurring
they must have been occurring	

Negation 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I mustn't occur
you mustn't occur
she mustn't occur
we mustn't occur
you mustn't occur
they mustn't occur 	I mustn't be occurring
you mustn't be occurring
she mustn't be occurring
we mustn't be occurring
you mustn't be occurring
they mustn't be occurring	I mustn't have occurred
you mustn't have occurred
she mustn't have occurred
we mustn't have occurred
you mustn't have occurred
they mustn't have occurred	I mustn't have been occurring
you mustn't have been occurring
she mustn't have been occurring
we mustn't have been occurring
you mustn't have been occurring
they mustn't have been occurring	

Fragende Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
must I occur?
must you occur?
must she occur?
must we occur?
must you occur?
must they occur? 	must I be occurring?
must you be occurring?
must she be occurring?
must we be occurring?
must you be occurring?
must they be occurring? 	must I have occurred?
must you have occurred?
must she have occurred?
must we have occurred?
must you have occurred?
must they have occurred? 	must I have been occurring?
must you have been occurring?
must she have been occurring?
must we have been occurring?
must you have been occurring?
must they have been occurring? 	

Fragende Negation Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
mustn't I occur?
mustn't you occur?
mustn't she occur?
mustn't we occur?
mustn't you occur?
mustn't they occur? 	mustn't I be occurring?
mustn't you be occurring?
mustn't she be occurring?
mustn't we be occurring?
mustn't you be occurring?
mustn't they be occurring? 	mustn't I have occurred?
mustn't you have occurred?
mustn't she have occurred?
mustn't we have occurred?
mustn't you have occurred?
mustn't they have occurred? 	mustn't I have been occurring?
mustn't you have been occurring?
mustn't she have been occurring?
mustn't we have been occurring?
mustn't you have been occurring?
mustn't they have been occurring?