must reckon
Verbo regular: reckon - reckoned- reckoned

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must reckon
you must reckon
he must reckon
we must reckon
you must reckon
they must reckon 	I must be reckoning
you must be reckoning
he must be reckoning
we must be reckoning
you must be reckoning
they must be reckoning	I must have reckoned
you must have reckoned
he must have reckoned
we must have reckoned
you must have reckoned
they must have reckoned	I must have been reckoning
you must have been reckoning
he must have been reckoning
we must have been reckoning
you must have been reckoning
they must have been reckoning	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not reckon
you must not reckon
he must not reckon
we must not reckon
you must not reckon
they must not reckon 	I must not be reckoning
you must not be reckoning
he must not be reckoning
we must not be reckoning
you must not be reckoning
they must not be reckoning	I must not have reckoned
you must not have reckoned
he must not have reckoned
we must not have reckoned
you must not have reckoned
they must not have reckoned	I must not have been reckoning
you must not have been reckoning
he must not have been reckoning
we must not have been reckoning
you must not have been reckoning
they must not have been reckoning	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I reckon?
must you reckon?
must he reckon?
must we reckon?
must you reckon?
must they reckon? 	must I be reckoning?
must you be reckoning?
must he be reckoning?
must we be reckoning?
must you be reckoning?
must they be reckoning? 	must I have reckoned?
must you have reckoned?
must he have reckoned?
must we have reckoned?
must you have reckoned?
must they have reckoned? 	must I have been reckoning?
must you have been reckoning?
must he have been reckoning?
must we have been reckoning?
must you have been reckoning?
must they have been reckoning? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not reckon?
must you not reckon?
must he not reckon?
must we not reckon?
must you not reckon?
must they not reckon? 	must I not be reckoning?
must you not be reckoning?
must he not be reckoning?
must we not be reckoning?
must you not be reckoning?
must they not be reckoning? 	must I not have reckoned?
must you not have reckoned?
must he not have reckoned?
must we not have reckoned?
must you not have reckoned?
must they not have reckoned? 	must I not have been reckoning?
must you not have been reckoning?
must he not have been reckoning?
must we not have been reckoning?
must you not have been reckoning?
must they not have been reckoning?