must happen
Regelmä&szlig;iges Verb: happen - happened- happened

Bestätigung 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
-
-
it must happen
-
-
- 	-
-
it must be happening
-
-
- 	-
-
it must have happened
-
-
- 	-
-
it must have been happening
-
-
- 	

Negation 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
-
-
it mustn't happen
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-
- 	-
-
it mustn't be happening
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-
- 	-
-
it mustn't have happened
-
-
- 	-
-
it mustn't have been happening
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-
- 	

Fragende Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
-
-
must it happen?
-
-
- 	-
-
must it be happening?
-
-
- 	-
-
must it have happened?
-
-
- 	-
-
must it have been happening?
-
-
- 	

Fragende Negation Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
-
-
mustn't it happen?
-
-
- 	-
-
mustn't it be happening?
-
-
- 	-
-
mustn't it have happened?
-
-
- 	-
-
mustn't it have been happening?
-
-
-