The Future Perfect Continuous is formed by means of the Future Perfect of the auxiliary verb to be and Participle I of the notional verb.
In the interrogative form the first auxiliary verb is placed before the subject. In the negative form the negative particle not is placed after the first auxiliary verb.
The use of the Future Perfect Continuous.
The Future Perfect Continuous denotes an action which will begin before a definite moment in the future, will continue up to that moment and will be going on at that moment.
