FUTURE PERFECT TENSE -> Is the combination between Future Tense and Perfect Tense. It is used to describe an action that has already happened and it will finish at certain time in the future.
For example :
1. I will have studied in this school for three years next month.
2. Tina will have finished her study by the end of next month.
3. Susy will have been 17 years old next July.
4. I will have lived in Surabaya for 30 years next December.
For Negative form just add NOT after Will.
Interrogative just put Will before the Subject of a sentence