may backfill
Verbo regular: backfill - backfilled- backfilled

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I may backfill
you may backfill
he may backfill
we may backfill
you may backfill
they may backfill 	I may be backfilling
you may be backfilling
he may be backfilling
we may be backfilling
you may be backfilling
they may be backfilling	I may have backfilled
you may have backfilled
he may have backfilled
we may have backfilled
you may have backfilled
they may have backfilled	I may have been backfilling
you may have been backfilling
he may have been backfilling
we may have been backfilling
you may have been backfilling
they may have been backfilling	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I mayn't backfill
you mayn't backfill
he mayn't backfill
we mayn't backfill
you mayn't backfill
they mayn't backfill 	I mayn't be backfilling
you mayn't be backfilling
he mayn't be backfilling
we mayn't be backfilling
you mayn't be backfilling
they mayn't be backfilling	I mayn't have backfilled
you mayn't have backfilled
he mayn't have backfilled
we mayn't have backfilled
you mayn't have backfilled
they mayn't have backfilled	I mayn't have been backfilling
you mayn't have been backfilling
he mayn't have been backfilling
we mayn't have been backfilling
you mayn't have been backfilling
they mayn't have been backfilling	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
may I backfill?
may you backfill?
may he backfill?
may we backfill?
may you backfill?
may they backfill? 	may I be backfilling?
may you be backfilling?
may he be backfilling?
may we be backfilling?
may you be backfilling?
may they be backfilling? 	may I have backfilled?
may you have backfilled?
may he have backfilled?
may we have backfilled?
may you have backfilled?
may they have backfilled? 	may I have been backfilling?
may you have been backfilling?
may he have been backfilling?
may we have been backfilling?
may you have been backfilling?
may they have been backfilling? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
mayn't I backfill?
mayn't you backfill?
mayn't he backfill?
mayn't we backfill?
mayn't you backfill?
mayn't they backfill? 	mayn't I be backfilling?
mayn't you be backfilling?
mayn't he be backfilling?
mayn't we be backfilling?
mayn't you be backfilling?
mayn't they be backfilling? 	mayn't I have backfilled?
mayn't you have backfilled?
mayn't he have backfilled?
mayn't we have backfilled?
mayn't you have backfilled?
mayn't they have backfilled? 	mayn't I have been backfilling?
mayn't you have been backfilling?
mayn't he have been backfilling?
mayn't we have been backfilling?
mayn't you have been backfilling?
mayn't they have been backfilling?