Question

give the structure of future indefinite tense active and passive

Answer 1

RULE FOR FUTURE INDEFINITE TENSE ACTIVE & PASSIVE

AFFIRMATIVE
ACTIVE
SUB. +WILL/SHALL+ VERB I + OBJ.
RAM WILL WRITE A LETTER.
PEOPLE WILL WRITE LETTERS.
PASSIVE
OBJ.+ WILL BE/SHALL BE + VERB III + BY + AGENT
A LETTER WILL BE WRITTEN BY RAM.
LETTERS WILL BE WRITTEN BY PEOPLE.

NEGATIVE
ACTIVE
SUB. + WILL/SHALL + NOT+ VERB I + OBJ.
RAM WILL NOT WRITE A LETTER.
PEOPLE WILL NOT WRITE LETTERS.
PASSIVE
OBJ.+ H.V +NOT + BE+ VERB III + BY + AGENT
A LETTER WILL NOT BE WRITTEN BY RAM.
LETTERS WILL NOT BE WRITTEN BY PEOPLE.

INTERROGATIVE ( H.V.)
ACTIVE
WILL/SHALL +SUB + VERB I + OBJ.
WILL RAM WRITE A LETTER?
WILL PEOPLE WRITE LETTERS?
PASSIVE
H.V.+OBJ +BE+ VERB III + BY + AGENT
WILL A LETTER BE WRITTEN BY RAM?
WILL LETTERS BE WRITTEN BY PEOPLE?

INTERROGATIVE ( Q.W.)
ACTIVE
Q.W+WILL/SHALL +SUB + VERB I + OBJ.
WHEN WILL RAM WRITE A LETTER?
WHEN WILL PEOPLE WRITE LETTERS?
PASSIVE
Q.W.+ H.V.+OBJ + BE+VERB III + BY + AGENT
WHEN WILL A LETTER BE WRITTEN BY RAM?
WHEN WILL LETTERS BE WRITTEN BY PEOPLE?

INTERROGATIVE NEGATIVE ( H.V.)
ACTIVE
WILL/SHALL +SUB+NOT + VERB I + OBJ.
WILL RAM NOT WRITE A LETTER?
WILL PEOPLE NOT WRITE LETTERS?
PASSIVE
H.V.+OBJ+NOT + BE+VERB III + BY + AGENT
WILL A LETTER NOT BE WRITTEN BY RAM?
WILL LETTERS NOT BE WRITTEN BY PEOPLE?

INTERROGATIVE NEGATIVE ( Q.W.)
ACTIVE
Q.W.+ H.V +SUB+NOT + VERB I + OBJ.
WHEN WILL RAM NOT WRITE A LETTER?
WHEN WILL PEOPLE NOT WRITE LETTERS?
PASSIVE
Q.W.+ WILL/SHALL+OBJ+ NOT+BE+ VERB III + BY + AGENT
WHEN WILL A LETTER NOT BE WRITTEN BY RAM?
WHEN WILL LETTERS NOT BE WRITTEN BY PEOPLE?

I hope helps you
By Sarvesh

Answer 2

Active: WH + will + S + be + V1 ing + object + ROTS
When will they be inviting us to the party?

Passive: WH + will + S + be + being + V3 + prep + object + ROTS
When will we be being invited by them to the party?