Conjugação do verbo inglês
MUST BACKFIT

Verbo irregular: backfit - backfit, backfitted - backfit, backfitted

Afirmação

Forma simple	Forma com V-ing
I must backfit you must backfit he must backfit we must backfit you must backfit they must backfit	I must be backfiting you must be backfiting he must be backfiting we must be backfiting you must be backfiting they must be backfiting
Perfeito	Perfeito com V-ing
I must have backfit, backfitted you must have backfit, backfitted he must have backfit, backfitted we must have backfit, backfitted you must have backfit, backfitted they must have backfit, backfitted	I must have been backfiting you must have been backfiting he must have been backfiting we must have been backfiting you must have been backfiting they must have been backfiting

Negação

Forma simple	Forma com V-ing
I mustn't backfit you mustn't backfit he mustn't backfit we mustn't backfit you mustn't backfit they mustn't backfit	I mustn't be backfiting you mustn't be backfiting he mustn't be backfiting we mustn't be backfiting you mustn't be backfiting they mustn't be backfiting
Perfeito	Perfeito com V-ing
I mustn't have backfit, backfitted you mustn't have backfit, backfitted he mustn't have backfit, backfitted we mustn't have backfit, backfitted you mustn't have backfit, backfitted they mustn't have backfit, backfitted	I mustn't have been backfiting you mustn't have been backfiting he mustn't have been backfiting we mustn't have been backfiting you mustn't have been backfiting they mustn't have been backfiting

Forma interrogativa

Forma simple	Forma com V-ing
must I backfit? must you backfit? must he backfit? must we backfit? must you backfit? must they backfit?	must I be backfiting? must you be backfiting? must he be backfiting? must we be backfiting? must you be backfiting? must they be backfiting?
Perfeito	Perfeito com V-ing
must I have backfit, backfitted? must you have backfit, backfitted? must he have backfit, backfitted? must we have backfit, backfitted? must you have backfit, backfitted? must they have backfit, backfitted?	must I have been backfiting? must you have been backfiting? must he have been backfiting? must we have been backfiting? must you have been backfiting? must they have been backfiting?

Forma interro-Negação

Forma simple	Forma com V-ing
mustn't I backfit? mustn't you backfit? mustn't he backfit? mustn't we backfit? mustn't you backfit? mustn't they backfit?	mustn't I be backfiting? mustn't you be backfiting? mustn't he be backfiting? mustn't we be backfiting? mustn't you be backfiting? mustn't they be backfiting?
Perfeito	Perfeito com V-ing
mustn't I have backfit, backfitted? mustn't you have backfit, backfitted? mustn't he have backfit, backfitted? mustn't we have backfit, backfitted? mustn't you have backfit, backfitted? mustn't they have backfit, backfitted?	mustn't I have been backfiting? mustn't you have been backfiting? mustn't he have been backfiting? mustn't we have been backfiting? mustn't you have been backfiting? mustn't they have been backfiting?