Conjugación del verbo inglés
MUST BACKFIRE

Verbo regular: backfire - backfired - backfired

Afirmación

Forma simple	Forma con V-ing
I must backfire you must backfire she must backfire we must backfire you must backfire they must backfire	I must be backfiring you must be backfiring she must be backfiring we must be backfiring you must be backfiring they must be backfiring
Perfecto	Perfecto con V-ing
I must have backfired you must have backfired she must have backfired we must have backfired you must have backfired they must have backfired	I must have been backfiring you must have been backfiring she must have been backfiring we must have been backfiring you must have been backfiring they must have been backfiring

Negación

Forma simple	Forma con V-ing
I must not backfire you must not backfire she must not backfire we must not backfire you must not backfire they must not backfire	I must not be backfiring you must not be backfiring she must not be backfiring we must not be backfiring you must not be backfiring they must not be backfiring
Perfecto	Perfecto con V-ing
I must not have backfired you must not have backfired she must not have backfired we must not have backfired you must not have backfired they must not have backfired	I must not have been backfiring you must not have been backfiring she must not have been backfiring we must not have been backfiring you must not have been backfiring they must not have been backfiring

Forma interrogativa

Forma simple	Forma con V-ing
must I backfire? must you backfire? must she backfire? must we backfire? must you backfire? must they backfire?	must I be backfiring? must you be backfiring? must she be backfiring? must we be backfiring? must you be backfiring? must they be backfiring?
Perfecto	Perfecto con V-ing
must I have backfired? must you have backfired? must she have backfired? must we have backfired? must you have backfired? must they have backfired?	must I have been backfiring? must you have been backfiring? must she have been backfiring? must we have been backfiring? must you have been backfiring? must they have been backfiring?

Forma interro-negativa

Forma simple	Forma con V-ing
must I not backfire? must you not backfire? must she not backfire? must we not backfire? must you not backfire? must they not backfire?	must I not be backfiring? must you not be backfiring? must she not be backfiring? must we not be backfiring? must you not be backfiring? must they not be backfiring?
Perfecto	Perfecto con V-ing
must I not have backfired? must you not have backfired? must she not have backfired? must we not have backfired? must you not have backfired? must they not have backfired?	must I not have been backfiring? must you not have been backfiring? must she not have been backfiring? must we not have been backfiring? must you not have been backfiring? must they not have been backfiring?