Structure of future perfect continuous (subject + will + have + been + verb+ing)
Now, let’s discuss how to use it. Its most common use is to say ‘how long‘ up to a point in the future. We use it with ‘for + a time period‘.
This is very similar to the way we use the past perfect continuous up to a point in the past and the present perfect continuous up to the present.
Let’s imagine that you have been at your job for 51 weeks and four days. Someone asks you ‘how long have you been working here?’. You don’t want to explain that it’s 51 weeks and four days, because that’s too complicated to say. Instead, you say ‘on Friday, I will have been working here for one year’.
Here are some more examples.
• Next month, I will have been living here for five years.
• At three o’clock, she will have been sleeping for nine hours.
• On January 2nd, people will have been using this building for six months.
Let’s review. Make sentences using the future perfect continuous.
1. for / at 5 pm / it / three days exactly / will have been raining
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2. I / next week / in London / for / will have been living / fifteen years
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3. for / will have been travelling / she / on the 5th of July / three months
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4. for / will have been standing / 300 years / in 2025 / the building
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5. on his birthday / for / he / the violin / forty years / will have been playing
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6. three hours / at 4 pm / I / for / will have been waiting
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7. for / the children / one month / on Sunday/ will have been studying / English
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8. will have been working / at 11 am / for / James / 24 hours
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9. she / in March / for / will have been practising / yoga / ten years
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10. will have been writing / for / I / this book / three weeks / tomorrow
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