I must backfill you must backfill she must backfill we must backfill you must backfill they must backfill
Forma com V-ing
I must be backfilling you must be backfilling she must be backfilling we must be backfilling you must be backfilling they must be backfilling
Perfeito
I must have backfilled you must have backfilled she must have backfilled we must have backfilled you must have backfilled they must have backfilled
Perfeito com V-ing
I must have been backfilling you must have been backfilling she must have been backfilling we must have been backfilling you must have been backfilling they must have been backfilling
Negação
Forma simple
I mustn't backfill you mustn't backfill she mustn't backfill we mustn't backfill you mustn't backfill they mustn't backfill
Forma com V-ing
I mustn't be backfilling you mustn't be backfilling she mustn't be backfilling we mustn't be backfilling you mustn't be backfilling they mustn't be backfilling
Perfeito
I mustn't have backfilled you mustn't have backfilled she mustn't have backfilled we mustn't have backfilled you mustn't have backfilled they mustn't have backfilled
Perfeito com V-ing
I mustn't have been backfilling you mustn't have been backfilling she mustn't have been backfilling we mustn't have been backfilling you mustn't have been backfilling they mustn't have been backfilling
Forma interrogativa
Forma simple
must I backfill? must you backfill? must she backfill? must we backfill? must you backfill? must they backfill?
Forma com V-ing
must I be backfilling? must you be backfilling? must she be backfilling? must we be backfilling? must you be backfilling? must they be backfilling?
Perfeito
must I have backfilled? must you have backfilled? must she have backfilled? must we have backfilled? must you have backfilled? must they have backfilled?
Perfeito com V-ing
must I have been backfilling? must you have been backfilling? must she have been backfilling? must we have been backfilling? must you have been backfilling? must they have been backfilling?
Forma interro-Negação
Forma simple
mustn't I backfill? mustn't you backfill? mustn't she backfill? mustn't we backfill? mustn't you backfill? mustn't they backfill?
Forma com V-ing
mustn't I be backfilling? mustn't you be backfilling? mustn't she be backfilling? mustn't we be backfilling? mustn't you be backfilling? mustn't they be backfilling?
Perfeito
mustn't I have backfilled? mustn't you have backfilled? mustn't she have backfilled? mustn't we have backfilled? mustn't you have backfilled? mustn't they have backfilled?
Perfeito com V-ing
mustn't I have been backfilling? mustn't you have been backfilling? mustn't she have been backfilling? mustn't we have been backfilling? mustn't you have been backfilling? mustn't they have been backfilling?