must respire
Verbo regular: respire - respired- respired

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must respire
you must respire
he must respire
we must respire
you must respire
they must respire 	I must be respiring
you must be respiring
he must be respiring
we must be respiring
you must be respiring
they must be respiring	I must have respired
you must have respired
he must have respired
we must have respired
you must have respired
they must have respired	I must have been respiring
you must have been respiring
he must have been respiring
we must have been respiring
you must have been respiring
they must have been respiring	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I must not respire
you must not respire
he must not respire
we must not respire
you must not respire
they must not respire 	I must not be respiring
you must not be respiring
he must not be respiring
we must not be respiring
you must not be respiring
they must not be respiring	I must not have respired
you must not have respired
he must not have respired
we must not have respired
you must not have respired
they must not have respired	I must not have been respiring
you must not have been respiring
he must not have been respiring
we must not have been respiring
you must not have been respiring
they must not have been respiring	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I respire?
must you respire?
must he respire?
must we respire?
must you respire?
must they respire? 	must I be respiring?
must you be respiring?
must he be respiring?
must we be respiring?
must you be respiring?
must they be respiring? 	must I have respired?
must you have respired?
must he have respired?
must we have respired?
must you have respired?
must they have respired? 	must I have been respiring?
must you have been respiring?
must he have been respiring?
must we have been respiring?
must you have been respiring?
must they have been respiring? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
must I not respire?
must you not respire?
must he not respire?
must we not respire?
must you not respire?
must they not respire? 	must I not be respiring?
must you not be respiring?
must he not be respiring?
must we not be respiring?
must you not be respiring?
must they not be respiring? 	must I not have respired?
must you not have respired?
must he not have respired?
must we not have respired?
must you not have respired?
must they not have respired? 	must I not have been respiring?
must you not have been respiring?
must he not have been respiring?
must we not have been respiring?
must you not have been respiring?
must they not have been respiring?