Identification: when the work is not completed but will be completed in future. The difference between future perfect and future continuous is that in future continuous, there is no surety about work being completed. It will be done—but in future perfect, it will be completed by the subject. In the future, the subject will be able to relate it through present perfect—I have. The time of the sentence is past.
1. I shall have gone to work at 9 A. M.
2. My mother will have given me tea before I sleep.
3. My friends will have come to my home by then.
Helping verbs used: will have, shall have
Affirmative: use of will have, shall have
1. I shall have done my work.
2. She will have gotten ready for the school.
Negative: use of will have not and shall have not
1. I shall have not done my work.
2. She will have not gotten ready for the school.
Interrogative: use of will have and shall have at the beginning of the sentence
1. Will you have gone to school?
2. Will he have worked on these projects?