must tiller
Verbo regular: tiller - tillered- tillered

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must tiller
you must tiller
he must tiller
we must tiller
you must tiller
they must tiller 	I must be tillering
you must be tillering
he must be tillering
we must be tillering
you must be tillering
they must be tillering	I must have tillered
you must have tillered
he must have tillered
we must have tillered
you must have tillered
they must have tillered	I must have been tillering
you must have been tillering
he must have been tillering
we must have been tillering
you must have been tillering
they must have been tillering	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not tiller
you must not tiller
he must not tiller
we must not tiller
you must not tiller
they must not tiller 	I must not be tillering
you must not be tillering
he must not be tillering
we must not be tillering
you must not be tillering
they must not be tillering	I must not have tillered
you must not have tillered
he must not have tillered
we must not have tillered
you must not have tillered
they must not have tillered	I must not have been tillering
you must not have been tillering
he must not have been tillering
we must not have been tillering
you must not have been tillering
they must not have been tillering	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I tiller?
must you tiller?
must he tiller?
must we tiller?
must you tiller?
must they tiller? 	must I be tillering?
must you be tillering?
must he be tillering?
must we be tillering?
must you be tillering?
must they be tillering? 	must I have tillered?
must you have tillered?
must he have tillered?
must we have tillered?
must you have tillered?
must they have tillered? 	must I have been tillering?
must you have been tillering?
must he have been tillering?
must we have been tillering?
must you have been tillering?
must they have been tillering? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not tiller?
must you not tiller?
must he not tiller?
must we not tiller?
must you not tiller?
must they not tiller? 	must I not be tillering?
must you not be tillering?
must he not be tillering?
must we not be tillering?
must you not be tillering?
must they not be tillering? 	must I not have tillered?
must you not have tillered?
must he not have tillered?
must we not have tillered?
must you not have tillered?
must they not have tillered? 	must I not have been tillering?
must you not have been tillering?
must he not have been tillering?
must we not have been tillering?
must you not have been tillering?
must they not have been tillering?