must trepan
Verbo regular: trepan - trepanned- trepanned

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must trepan
you must trepan
he must trepan
we must trepan
you must trepan
they must trepan 	I must be trepanning
you must be trepanning
he must be trepanning
we must be trepanning
you must be trepanning
they must be trepanning	I must have trepanned
you must have trepanned
he must have trepanned
we must have trepanned
you must have trepanned
they must have trepanned	I must have been trepanning
you must have been trepanning
he must have been trepanning
we must have been trepanning
you must have been trepanning
they must have been trepanning	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not trepan
you must not trepan
he must not trepan
we must not trepan
you must not trepan
they must not trepan 	I must not be trepanning
you must not be trepanning
he must not be trepanning
we must not be trepanning
you must not be trepanning
they must not be trepanning	I must not have trepanned
you must not have trepanned
he must not have trepanned
we must not have trepanned
you must not have trepanned
they must not have trepanned	I must not have been trepanning
you must not have been trepanning
he must not have been trepanning
we must not have been trepanning
you must not have been trepanning
they must not have been trepanning	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I trepan?
must you trepan?
must he trepan?
must we trepan?
must you trepan?
must they trepan? 	must I be trepanning?
must you be trepanning?
must he be trepanning?
must we be trepanning?
must you be trepanning?
must they be trepanning? 	must I have trepanned?
must you have trepanned?
must he have trepanned?
must we have trepanned?
must you have trepanned?
must they have trepanned? 	must I have been trepanning?
must you have been trepanning?
must he have been trepanning?
must we have been trepanning?
must you have been trepanning?
must they have been trepanning? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not trepan?
must you not trepan?
must he not trepan?
must we not trepan?
must you not trepan?
must they not trepan? 	must I not be trepanning?
must you not be trepanning?
must he not be trepanning?
must we not be trepanning?
must you not be trepanning?
must they not be trepanning? 	must I not have trepanned?
must you not have trepanned?
must he not have trepanned?
must we not have trepanned?
must you not have trepanned?
must they not have trepanned? 	must I not have been trepanning?
must you not have been trepanning?
must he not have been trepanning?
must we not have been trepanning?
must you not have been trepanning?
must they not have been trepanning?