must countermine
Verbo regular: countermine - countermined- countermined

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must countermine
you must countermine
he must countermine
we must countermine
you must countermine
they must countermine 	I must be countermining
you must be countermining
he must be countermining
we must be countermining
you must be countermining
they must be countermining	I must have countermined
you must have countermined
he must have countermined
we must have countermined
you must have countermined
they must have countermined	I must have been countermining
you must have been countermining
he must have been countermining
we must have been countermining
you must have been countermining
they must have been countermining	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not countermine
you must not countermine
he must not countermine
we must not countermine
you must not countermine
they must not countermine 	I must not be countermining
you must not be countermining
he must not be countermining
we must not be countermining
you must not be countermining
they must not be countermining	I must not have countermined
you must not have countermined
he must not have countermined
we must not have countermined
you must not have countermined
they must not have countermined	I must not have been countermining
you must not have been countermining
he must not have been countermining
we must not have been countermining
you must not have been countermining
they must not have been countermining	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I countermine?
must you countermine?
must he countermine?
must we countermine?
must you countermine?
must they countermine? 	must I be countermining?
must you be countermining?
must he be countermining?
must we be countermining?
must you be countermining?
must they be countermining? 	must I have countermined?
must you have countermined?
must he have countermined?
must we have countermined?
must you have countermined?
must they have countermined? 	must I have been countermining?
must you have been countermining?
must he have been countermining?
must we have been countermining?
must you have been countermining?
must they have been countermining? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not countermine?
must you not countermine?
must he not countermine?
must we not countermine?
must you not countermine?
must they not countermine? 	must I not be countermining?
must you not be countermining?
must he not be countermining?
must we not be countermining?
must you not be countermining?
must they not be countermining? 	must I not have countermined?
must you not have countermined?
must he not have countermined?
must we not have countermined?
must you not have countermined?
must they not have countermined? 	must I not have been countermining?
must you not have been countermining?
must he not have been countermining?
must we not have been countermining?
must you not have been countermining?
must they not have been countermining?