I'll be backfilling you'll be backfilling she'll be backfilling we'll be backfilling you'll be backfilling they'll be backfilling
Perfect
I'll have backfilled you'll have backfilled she'll have backfilled we'll have backfilled you'll have backfilled they'll have backfilled
V-ing perfect
I'll have been backfilling you'll have been backfilling she'll have been backfilling we'll have been backfilling you'll have been backfilling they'll have been backfilling
Negation
Simple form
I shan't backfill you shan't backfill she shan't backfill we shan't backfill you shan't backfill they shan't backfill
V-ing form
I shan't be backfilling you shan't be backfilling she shan't be backfilling we shan't be backfilling you shan't be backfilling they shan't be backfilling
Perfect
I shan't have backfilled you shan't have backfilled she shan't have backfilled we shan't have backfilled you shan't have backfilled they shan't have backfilled
V-ing perfect
I shan't have been backfilling you shan't have been backfilling she shan't have been backfilling we shan't have been backfilling you shan't have been backfilling they shan't have been backfilling
Interrogative form
Simple form
shall I backfill? shall you backfill? shall she backfill? shall we backfill? shall you backfill? shall they backfill?
V-ing form
shall I be backfilling? shall you be backfilling? shall she be backfilling? shall we be backfilling? shall you be backfilling? shall they be backfilling?
Perfect
shall I have backfilled? shall you have backfilled? shall she have backfilled? shall we have backfilled? shall you have backfilled? shall they have backfilled?
V-ing perfect
shall I have been backfilling? shall you have been backfilling? shall she have been backfilling? shall we have been backfilling? shall you have been backfilling? shall they have been backfilling?
Interro-negative form
Simple form
shan't I backfill? shan't you backfill? shan't she backfill? shan't we backfill? shan't you backfill? shan't they backfill?
V-ing form
shan't I be backfilling? shan't you be backfilling? shan't she be backfilling? shan't we be backfilling? shan't you be backfilling? shan't they be backfilling?
Perfect
shan't I have backfilled? shan't you have backfilled? shan't she have backfilled? shan't we have backfilled? shan't you have backfilled? shan't they have backfilled?
V-ing perfect
shan't I have been backfilling? shan't you have been backfilling? shan't she have been backfilling? shan't we have been backfilling? shan't you have been backfilling? shan't they have been backfilling?