must check
Verbo regolare: check - checked- checked

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I must check
you must check
she must check
we must check
you must check
they must check 	I must be checking
you must be checking
she must be checking
we must be checking
you must be checking
they must be checking	I must have checked
you must have checked
she must have checked
we must have checked
you must have checked
they must have checked	I must have been checking
you must have been checking
she must have been checking
we must have been checking
you must have been checking
they must have been checking	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I must not check
you must not check
she must not check
we must not check
you must not check
they must not check 	I must not be checking
you must not be checking
she must not be checking
we must not be checking
you must not be checking
they must not be checking	I must not have checked
you must not have checked
she must not have checked
we must not have checked
you must not have checked
they must not have checked	I must not have been checking
you must not have been checking
she must not have been checking
we must not have been checking
you must not have been checking
they must not have been checking	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
must I check?
must you check?
must she check?
must we check?
must you check?
must they check? 	must I be checking?
must you be checking?
must she be checking?
must we be checking?
must you be checking?
must they be checking? 	must I have checked?
must you have checked?
must she have checked?
must we have checked?
must you have checked?
must they have checked? 	must I have been checking?
must you have been checking?
must she have been checking?
must we have been checking?
must you have been checking?
must they have been checking? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
must I not check?
must you not check?
must she not check?
must we not check?
must you not check?
must they not check? 	must I not be checking?
must you not be checking?
must she not be checking?
must we not be checking?
must you not be checking?
must they not be checking? 	must I not have checked?
must you not have checked?
must she not have checked?
must we not have checked?
must you not have checked?
must they not have checked? 	must I not have been checking?
must you not have been checking?
must she not have been checking?
must we not have been checking?
must you not have been checking?
must they not have been checking?