The Future Continuous is formed by means of the auxiliary verb to be in the Future Indefinite and the Present Participle of the main verb.
In the interrogative form the auxiliary verb shall or will is placed before the subject. In the negative form the particle not is used after the auxiliary verb shall or will.
The Future Continuous is used to express an action going on at a definite moment or during a definite period of time in the future.
In present-day English the Future Continuous is often used in the same meaning as the Future Indefinite that is to express a future action.