must subtend
Verbo regular: subtend - subtended- subtended

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must subtend
you must subtend
he must subtend
we must subtend
you must subtend
they must subtend 	I must be subtending
you must be subtending
he must be subtending
we must be subtending
you must be subtending
they must be subtending	I must have subtended
you must have subtended
he must have subtended
we must have subtended
you must have subtended
they must have subtended	I must have been subtending
you must have been subtending
he must have been subtending
we must have been subtending
you must have been subtending
they must have been subtending	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not subtend
you must not subtend
he must not subtend
we must not subtend
you must not subtend
they must not subtend 	I must not be subtending
you must not be subtending
he must not be subtending
we must not be subtending
you must not be subtending
they must not be subtending	I must not have subtended
you must not have subtended
he must not have subtended
we must not have subtended
you must not have subtended
they must not have subtended	I must not have been subtending
you must not have been subtending
he must not have been subtending
we must not have been subtending
you must not have been subtending
they must not have been subtending	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I subtend?
must you subtend?
must he subtend?
must we subtend?
must you subtend?
must they subtend? 	must I be subtending?
must you be subtending?
must he be subtending?
must we be subtending?
must you be subtending?
must they be subtending? 	must I have subtended?
must you have subtended?
must he have subtended?
must we have subtended?
must you have subtended?
must they have subtended? 	must I have been subtending?
must you have been subtending?
must he have been subtending?
must we have been subtending?
must you have been subtending?
must they have been subtending? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not subtend?
must you not subtend?
must he not subtend?
must we not subtend?
must you not subtend?
must they not subtend? 	must I not be subtending?
must you not be subtending?
must he not be subtending?
must we not be subtending?
must you not be subtending?
must they not be subtending? 	must I not have subtended?
must you not have subtended?
must he not have subtended?
must we not have subtended?
must you not have subtended?
must they not have subtended? 	must I not have been subtending?
must you not have been subtending?
must he not have been subtending?
must we not have been subtending?
must you not have been subtending?
must they not have been subtending?