must concentrate
Regelmä&szlig;iges Verb: concentrate - concentrated- concentrated

Bestätigung 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I must concentrate
you must concentrate
she must concentrate
we must concentrate
you must concentrate
they must concentrate 	I must be concentrating
you must be concentrating
she must be concentrating
we must be concentrating
you must be concentrating
they must be concentrating	I must have concentrated
you must have concentrated
she must have concentrated
we must have concentrated
you must have concentrated
they must have concentrated	I must have been concentrating
you must have been concentrating
she must have been concentrating
we must have been concentrating
you must have been concentrating
they must have been concentrating	

Negation 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
I must not concentrate
you must not concentrate
she must not concentrate
we must not concentrate
you must not concentrate
they must not concentrate 	I must not be concentrating
you must not be concentrating
she must not be concentrating
we must not be concentrating
you must not be concentrating
they must not be concentrating	I must not have concentrated
you must not have concentrated
she must not have concentrated
we must not have concentrated
you must not have concentrated
they must not have concentrated	I must not have been concentrating
you must not have been concentrating
she must not have been concentrating
we must not have been concentrating
you must not have been concentrating
they must not have been concentrating	

Fragende Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
must I concentrate?
must you concentrate?
must she concentrate?
must we concentrate?
must you concentrate?
must they concentrate? 	must I be concentrating?
must you be concentrating?
must she be concentrating?
must we be concentrating?
must you be concentrating?
must they be concentrating? 	must I have concentrated?
must you have concentrated?
must she have concentrated?
must we have concentrated?
must you have concentrated?
must they have concentrated? 	must I have been concentrating?
must you have been concentrating?
must she have been concentrating?
must we have been concentrating?
must you have been concentrating?
must they have been concentrating? 	

Fragende Negation Form 	
Einfache Form 	Form mit V-ing 	Perfekt 	Perfekt mit V-ing 	
must I not concentrate?
must you not concentrate?
must she not concentrate?
must we not concentrate?
must you not concentrate?
must they not concentrate? 	must I not be concentrating?
must you not be concentrating?
must she not be concentrating?
must we not be concentrating?
must you not be concentrating?
must they not be concentrating? 	must I not have concentrated?
must you not have concentrated?
must she not have concentrated?
must we not have concentrated?
must you not have concentrated?
must they not have concentrated? 	must I not have been concentrating?
must you not have been concentrating?
must she not have been concentrating?
must we not have been concentrating?
must you not have been concentrating?
must they not have been concentrating?