The Use
The perfect future tense is used when something will happen before a future point but this event has an effect until now.
.The Rule/Form (active voice)
Positive Sentence Structure :
Subject + will + have + verb (in the past participle form) + object. Example: I will have asked you before you will leave.
In this example "I will ask you" is the tense and "before you will leave" is the future point. The effect that this event does until now is me preparing this
question
in my head
Negative Sentence Structure :
Subject + will + not + have + verb (in the past participle form) + object. Example: I willn't have asked you before you will leave.
Question Sentence Structure :
Will + subject + have + object + "?". Example: Will I have asked you before you leave?
Tag Question Sentence Structure :
Will + not + subject(pronoun) + "?". Example: I will have asked you before you will leave. willn't I?
The Rule/Form (passive voice)
Positive Sentence Structure :
Subject + will + have + been + verb (in the past participle form) + object. Example: you will have been asked.
Negative Sentence Structure :
Subject + will + not + have + been + verb (in the past participle form) + object. Example: you willn't have been asked.
Question Sentence Structure :
Will + subject + have + been + object + "?". Example: Will I have asked you before you leave?
Tag Question Sentence Structure :
Will + not (if the sentence before it was positive + subject(pronoun) + "?". Example: you will have been asked. willn't you?
A Test
1 - The cake ___ ___ ____ ____ [eat] tomorrow.
A - will be eaten.
B - will have been eaten.
C - will has been eated.
2 - I ___ ____ ____ [bake] a cake tomorrow.
A - will have baked.
B - will has baked.
C - will is bake.
Answers
[ 1B - 2A ]