must tabby
Verbo regular: tabby - tabbied- tabbied

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must tabby
you must tabby
he must tabby
we must tabby
you must tabby
they must tabby 	I must be tabbying
you must be tabbying
he must be tabbying
we must be tabbying
you must be tabbying
they must be tabbying	I must have tabbied
you must have tabbied
he must have tabbied
we must have tabbied
you must have tabbied
they must have tabbied	I must have been tabbying
you must have been tabbying
he must have been tabbying
we must have been tabbying
you must have been tabbying
they must have been tabbying	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not tabby
you must not tabby
he must not tabby
we must not tabby
you must not tabby
they must not tabby 	I must not be tabbying
you must not be tabbying
he must not be tabbying
we must not be tabbying
you must not be tabbying
they must not be tabbying	I must not have tabbied
you must not have tabbied
he must not have tabbied
we must not have tabbied
you must not have tabbied
they must not have tabbied	I must not have been tabbying
you must not have been tabbying
he must not have been tabbying
we must not have been tabbying
you must not have been tabbying
they must not have been tabbying	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I tabby?
must you tabby?
must he tabby?
must we tabby?
must you tabby?
must they tabby? 	must I be tabbying?
must you be tabbying?
must he be tabbying?
must we be tabbying?
must you be tabbying?
must they be tabbying? 	must I have tabbied?
must you have tabbied?
must he have tabbied?
must we have tabbied?
must you have tabbied?
must they have tabbied? 	must I have been tabbying?
must you have been tabbying?
must he have been tabbying?
must we have been tabbying?
must you have been tabbying?
must they have been tabbying? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not tabby?
must you not tabby?
must he not tabby?
must we not tabby?
must you not tabby?
must they not tabby? 	must I not be tabbying?
must you not be tabbying?
must he not be tabbying?
must we not be tabbying?
must you not be tabbying?
must they not be tabbying? 	must I not have tabbied?
must you not have tabbied?
must he not have tabbied?
must we not have tabbied?
must you not have tabbied?
must they not have tabbied? 	must I not have been tabbying?
must you not have been tabbying?
must he not have been tabbying?
must we not have been tabbying?
must you not have been tabbying?
must they not have been tabbying?