English verb conjugation
MUST RESPIRE

Regular verb: respire - respired - respired

Affirmation

Simple form	V-ing form
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
Perfect	V-ing perfect
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

Negation

Simple form	V-ing form
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
Perfect	V-ing perfect
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

Interrogative form

Simple form	V-ing form
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?
Perfect	V-ing perfect
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?

Interro-negative form

Simple form	V-ing form
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?
Perfect	V-ing perfect
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?