English verb conjugation
SHALL BACKFILL

Regular verb: backfill - backfilled - backfilled

Affirmation

Simple form	V-ing form
I shall backfill you shall backfill he shall backfill we shall backfill you shall backfill they shall backfill	I shall be backfilling you shall be backfilling he shall be backfilling we shall be backfilling you shall be backfilling they shall be backfilling
Perfect	V-ing perfect
I shall have backfilled you shall have backfilled he shall have backfilled we shall have backfilled you shall have backfilled they shall have backfilled	I shall have been backfilling you shall have been backfilling he shall have been backfilling we shall have been backfilling you shall have been backfilling they shall have been backfilling

Negation

Simple form	V-ing form
I shall not backfill you shall not backfill he shall not backfill we shall not backfill you shall not backfill they shall not backfill	I shall not be backfilling you shall not be backfilling he shall not be backfilling we shall not be backfilling you shall not be backfilling they shall not be backfilling
Perfect	V-ing perfect
I shall not have backfilled you shall not have backfilled he shall not have backfilled we shall not have backfilled you shall not have backfilled they shall not have backfilled	I shall not have been backfilling you shall not have been backfilling he shall not have been backfilling we shall not have been backfilling you shall not have been backfilling they shall not have been backfilling

Interrogative form

Simple form	V-ing form
shall I backfill? shall you backfill? shall he backfill? shall we backfill? shall you backfill? shall they backfill?	shall I be backfilling? shall you be backfilling? shall he be backfilling? shall we be backfilling? shall you be backfilling? shall they be backfilling?
Perfect	V-ing perfect
shall I have backfilled? shall you have backfilled? shall he have backfilled? shall we have backfilled? shall you have backfilled? shall they have backfilled?	shall I have been backfilling? shall you have been backfilling? shall he have been backfilling? shall we have been backfilling? shall you have been backfilling? shall they have been backfilling?

Interro-negative form

Simple form	V-ing form
shall I not backfill? shall you not backfill? shall he not backfill? shall we not backfill? shall you not backfill? shall they not backfill?	shall I not be backfilling? shall you not be backfilling? shall he not be backfilling? shall we not be backfilling? shall you not be backfilling? shall they not be backfilling?
Perfect	V-ing perfect
shall I not have backfilled? shall you not have backfilled? shall he not have backfilled? shall we not have backfilled? shall you not have backfilled? shall they not have backfilled?	shall I not have been backfilling? shall you not have been backfilling? shall he not have been backfilling? shall we not have been backfilling? shall you not have been backfilling? shall they not have been backfilling?