Future Perfect Continuous

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The future perfect continuous tense is used when you want to emphasize an event or activy that be continuous after specific future time.
 
The future perfect continuous verb tense is used to:

Emphasize - how long an event will be in progress at a future time
Stress - the the length of time an event or action in the future
Results - used to state the results of an action or event in the future.
Represents A Continuous Action - that stated at some point, and continues into some point in the future
Rules for using the future perfect continues verb tense:

The future period of time if usually states:
next year
next week
next month etc.
the exact came can be stated
the approximate can can be stated
The future perfect continuous verb tense is usually not used with static verbs.

The future perfect continuous verb tense can't be used with "time clauses" such as when, while, "by the time", soon, before, after, if, unless, until etc.

Examples:

In the fall, I will have been studying here for 2 years.
My son will have been in teaching for 10 years next month.
The teacher will have been teaching my children for 5 years next month.
Tammy will be very tired when she comes home, because she will have been flying over 24 hours.


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Understand how to build sentences using the future perfect verb continuous tense?
The future perfect continuous verb tense uses 4 kinds of verbs, 3 auxiliary verbs and 1 main verb.
The auxiliary verb "will" does not change according to the subject.
The auxiliary verb "have" always stays in the base form.
-ing is added to the base form of the main verb.
Negative Sentences - "not" is added between the auxiliary verb "will" and the main verb.
Questions - the order of the sentence is changed. The verb "will" comes first, then the subject.


; Examples

• In ten minutes, I will have been waiting 1 hour for the bus.
• We will have been working here for 10 years in June.
• Robert will have been living in France for 1 year next month.
• We will have been saving money for many years, by the time you need to go to college.

; Questions 

• Will I have been working here long enough to get an extra week vacation this summer?
• Will we have been living in the states long enough to get citizenship next year?