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