must clack
Verbo regolare: clack - clacked- clacked

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I must clack
you must clack
he must clack
we must clack
you must clack
they must clack 	I must be clacking
you must be clacking
he must be clacking
we must be clacking
you must be clacking
they must be clacking	I must have clacked
you must have clacked
he must have clacked
we must have clacked
you must have clacked
they must have clacked	I must have been clacking
you must have been clacking
he must have been clacking
we must have been clacking
you must have been clacking
they must have been clacking	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I must not clack
you must not clack
he must not clack
we must not clack
you must not clack
they must not clack 	I must not be clacking
you must not be clacking
he must not be clacking
we must not be clacking
you must not be clacking
they must not be clacking	I must not have clacked
you must not have clacked
he must not have clacked
we must not have clacked
you must not have clacked
they must not have clacked	I must not have been clacking
you must not have been clacking
he must not have been clacking
we must not have been clacking
you must not have been clacking
they must not have been clacking	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
must I clack?
must you clack?
must he clack?
must we clack?
must you clack?
must they clack? 	must I be clacking?
must you be clacking?
must he be clacking?
must we be clacking?
must you be clacking?
must they be clacking? 	must I have clacked?
must you have clacked?
must he have clacked?
must we have clacked?
must you have clacked?
must they have clacked? 	must I have been clacking?
must you have been clacking?
must he have been clacking?
must we have been clacking?
must you have been clacking?
must they have been clacking? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
must I not clack?
must you not clack?
must he not clack?
must we not clack?
must you not clack?
must they not clack? 	must I not be clacking?
must you not be clacking?
must he not be clacking?
must we not be clacking?
must you not be clacking?
must they not be clacking? 	must I not have clacked?
must you not have clacked?
must he not have clacked?
must we not have clacked?
must you not have clacked?
must they not have clacked? 	must I not have been clacking?
must you not have been clacking?
must he not have been clacking?
must we not have been clacking?
must you not have been clacking?
must they not have been clacking?