must fail
Regelmä&szlig;iges Verb: fail - failed- failed

Bestätigung 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I must fail
you must fail
she must fail
we must fail
you must fail
they must fail 	I must be failing
you must be failing
she must be failing
we must be failing
you must be failing
they must be failing	I must have failed
you must have failed
she must have failed
we must have failed
you must have failed
they must have failed	I must have been failing
you must have been failing
she must have been failing
we must have been failing
you must have been failing
they must have been failing	

Negation 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I must not fail
you must not fail
she must not fail
we must not fail
you must not fail
they must not fail 	I must not be failing
you must not be failing
she must not be failing
we must not be failing
you must not be failing
they must not be failing	I must not have failed
you must not have failed
she must not have failed
we must not have failed
you must not have failed
they must not have failed	I must not have been failing
you must not have been failing
she must not have been failing
we must not have been failing
you must not have been failing
they must not have been failing	

Fragende Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
must I fail?
must you fail?
must she fail?
must we fail?
must you fail?
must they fail? 	must I be failing?
must you be failing?
must she be failing?
must we be failing?
must you be failing?
must they be failing? 	must I have failed?
must you have failed?
must she have failed?
must we have failed?
must you have failed?
must they have failed? 	must I have been failing?
must you have been failing?
must she have been failing?
must we have been failing?
must you have been failing?
must they have been failing? 	

Fragende Negation Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
must I not fail?
must you not fail?
must she not fail?
must we not fail?
must you not fail?
must they not fail? 	must I not be failing?
must you not be failing?
must she not be failing?
must we not be failing?
must you not be failing?
must they not be failing? 	must I not have failed?
must you not have failed?
must she not have failed?
must we not have failed?
must you not have failed?
must they not have failed? 	must I not have been failing?
must you not have been failing?
must she not have been failing?
must we not have been failing?
must you not have been failing?
must they not have been failing?