FUTURE PERFECT TENSE:
The firs is present future tense, it is used when you guys are want to explain the condition you will already done in the future, to put it simple it's like "prediction" here are some example and the pattern

Pattern:
+: s+will have+ v3

-: s+will not+have+v3

?: will+s+have+v3+?

5w1h: what/where/how+will+s+ have+v3+?


Example (active):
+: Andi will have dated Ani
-: Andi will not have dated Ani
?: Will Andi have dated Ani?
5W1H: Who will Andy have dated?

Example (passive):
+: Ani will have been dated by Andy
-: Ani will not have been dated by Andy
?: Will Ani have dated by Andy?
5W1H: Who will have dated by Andy?


FUTURE PERFECT CONTINUOUS:
Okaay.. another complicated thing just show up... actually this tense is the same as on above but in this tense the condition is still happening /going on/continue

Pattern:
+: s+will have+been+ v/ing+noun+object

-: s+will not+have+been+v/ing

?: will+s+have+been+v/ing+?

5w1h: what/where/how+will+s+ have+been+v/ing+?


Example (active):
+: Andi will have been eating rice
-: Andi will not have deating rice
?: Will Andi have been eating rice?
5W1H: What will Andy have been eating?

Example (passive):
+: Rice will have been being eaten by Andy
-: Rice will not have been being eaten by Andy
?: Will Rice have been being eaten by Andy?
5W1H: What will have been being eaten by Andy?

P.S: you can add object or anything else in this case like in the example or like "Andi will have dated Ani by the time of midnight/Andy will have been eating rice by then" i add some time condition

so... this is the end, i hope it will usefull for everyone who see this CMIIW and please forgive me if i got mistake here and... keep study everyone...