must tat
Verbo regular: tat - tatted- tatted

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must tat
you must tat
he must tat
we must tat
you must tat
they must tat 	I must be tatting
you must be tatting
he must be tatting
we must be tatting
you must be tatting
they must be tatting	I must have tatted
you must have tatted
he must have tatted
we must have tatted
you must have tatted
they must have tatted	I must have been tatting
you must have been tatting
he must have been tatting
we must have been tatting
you must have been tatting
they must have been tatting	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not tat
you must not tat
he must not tat
we must not tat
you must not tat
they must not tat 	I must not be tatting
you must not be tatting
he must not be tatting
we must not be tatting
you must not be tatting
they must not be tatting	I must not have tatted
you must not have tatted
he must not have tatted
we must not have tatted
you must not have tatted
they must not have tatted	I must not have been tatting
you must not have been tatting
he must not have been tatting
we must not have been tatting
you must not have been tatting
they must not have been tatting	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I tat?
must you tat?
must he tat?
must we tat?
must you tat?
must they tat? 	must I be tatting?
must you be tatting?
must he be tatting?
must we be tatting?
must you be tatting?
must they be tatting? 	must I have tatted?
must you have tatted?
must he have tatted?
must we have tatted?
must you have tatted?
must they have tatted? 	must I have been tatting?
must you have been tatting?
must he have been tatting?
must we have been tatting?
must you have been tatting?
must they have been tatting? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not tat?
must you not tat?
must he not tat?
must we not tat?
must you not tat?
must they not tat? 	must I not be tatting?
must you not be tatting?
must he not be tatting?
must we not be tatting?
must you not be tatting?
must they not be tatting? 	must I not have tatted?
must you not have tatted?
must he not have tatted?
must we not have tatted?
must you not have tatted?
must they not have tatted? 	must I not have been tatting?
must you not have been tatting?
must he not have been tatting?
must we not have been tatting?
must you not have been tatting?
must they not have been tatting?