If you want to talk about a job that will be completed in the future, you must first learn about the nature of the job. If the verb you are going to use is a verb that requires continuity, that is to say, if it is not something that is immediate and requires constant effort, it may make sense to use Future Perfect Continuous Tense.

Here are 5 Future Perfect Continuous Tense Sentences;

At 4 o’clock, we will have been waiting you for one hour.
They will have been teaching German for 5 years by the end of this year.
I will not have been shopping in Wednesday, you can come to see me.
I will have been reading forty-five books by Christmas.
Next month I'll have been studying Chinese for two years.

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