must yack
Regelmä&szlig;iges Verb: yack - yacked- yacked

Bestätigung 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I must yack
you must yack
she must yack
we must yack
you must yack
they must yack 	I must be yacking
you must be yacking
she must be yacking
we must be yacking
you must be yacking
they must be yacking	I must have yacked
you must have yacked
she must have yacked
we must have yacked
you must have yacked
they must have yacked	I must have been yacking
you must have been yacking
she must have been yacking
we must have been yacking
you must have been yacking
they must have been yacking	

Negation 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I must not yack
you must not yack
she must not yack
we must not yack
you must not yack
they must not yack 	I must not be yacking
you must not be yacking
she must not be yacking
we must not be yacking
you must not be yacking
they must not be yacking	I must not have yacked
you must not have yacked
she must not have yacked
we must not have yacked
you must not have yacked
they must not have yacked	I must not have been yacking
you must not have been yacking
she must not have been yacking
we must not have been yacking
you must not have been yacking
they must not have been yacking	

Fragende Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
must I yack?
must you yack?
must she yack?
must we yack?
must you yack?
must they yack? 	must I be yacking?
must you be yacking?
must she be yacking?
must we be yacking?
must you be yacking?
must they be yacking? 	must I have yacked?
must you have yacked?
must she have yacked?
must we have yacked?
must you have yacked?
must they have yacked? 	must I have been yacking?
must you have been yacking?
must she have been yacking?
must we have been yacking?
must you have been yacking?
must they have been yacking? 	

Fragende Negation Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
must I not yack?
must you not yack?
must she not yack?
must we not yack?
must you not yack?
must they not yack? 	must I not be yacking?
must you not be yacking?
must she not be yacking?
must we not be yacking?
must you not be yacking?
must they not be yacking? 	must I not have yacked?
must you not have yacked?
must she not have yacked?
must we not have yacked?
must you not have yacked?
must they not have yacked? 	must I not have been yacking?
must you not have been yacking?
must she not have been yacking?
must we not have been yacking?
must you not have been yacking?
must they not have been yacking?