must tong
Verbo regular: tong - tonged- tonged

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must tong
you must tong
she must tong
we must tong
you must tong
they must tong 	I must be tonging
you must be tonging
she must be tonging
we must be tonging
you must be tonging
they must be tonging	I must have tonged
you must have tonged
she must have tonged
we must have tonged
you must have tonged
they must have tonged	I must have been tonging
you must have been tonging
she must have been tonging
we must have been tonging
you must have been tonging
they must have been tonging	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not tong
you must not tong
she must not tong
we must not tong
you must not tong
they must not tong 	I must not be tonging
you must not be tonging
she must not be tonging
we must not be tonging
you must not be tonging
they must not be tonging	I must not have tonged
you must not have tonged
she must not have tonged
we must not have tonged
you must not have tonged
they must not have tonged	I must not have been tonging
you must not have been tonging
she must not have been tonging
we must not have been tonging
you must not have been tonging
they must not have been tonging	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I tong?
must you tong?
must she tong?
must we tong?
must you tong?
must they tong? 	must I be tonging?
must you be tonging?
must she be tonging?
must we be tonging?
must you be tonging?
must they be tonging? 	must I have tonged?
must you have tonged?
must she have tonged?
must we have tonged?
must you have tonged?
must they have tonged? 	must I have been tonging?
must you have been tonging?
must she have been tonging?
must we have been tonging?
must you have been tonging?
must they have been tonging? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not tong?
must you not tong?
must she not tong?
must we not tong?
must you not tong?
must they not tong? 	must I not be tonging?
must you not be tonging?
must she not be tonging?
must we not be tonging?
must you not be tonging?
must they not be tonging? 	must I not have tonged?
must you not have tonged?
must she not have tonged?
must we not have tonged?
must you not have tonged?
must they not have tonged? 	must I not have been tonging?
must you not have been tonging?
must she not have been tonging?
must we not have been tonging?
must you not have been tonging?
must they not have been tonging?