Use the future perfect tense to express what will happened by a certain time in the future. The future perfect tense is often used to express achievements or work done by a future point in time.
This tense is often used with the following time expressions:
... by Monday, Tuesday, etc.
... by the time ...
... by five o'clock, two-thirty, etc.
Basic Construction
Positive
Subject + will + have + past participle + object(s) + time Expression
They will have finished the report by tomorrow afternoon.
Negative
Subject + will not (won't) + have + past participle + object(s) + time Expression
Mary won't have answered all the questions by the end of this hour.
Question
(Question Word) + will + subject + have + past participle + object(s) + time Expression
What will you have done by the end of this month?
