Future Continuous
- Use the future continuous to talk about an activity that will be in progress at a point or period in the future.
- When you arrive home tonight they will be watching TV.
- We sometimes use the future continuous to talk about organized or official future events.
- The local band The Elements will be performing tomorrow.
- We sometimes use the future continuous to make polite enquiries about people’s plans.
- Will you be having dinner before you go out tonight? (= I want to know your plans for dinner tonight.)
- We sometimes use the future continuous to emphasize how long an activity will last.
- Your kids will be enjoying sports, adventure games and survival activities from morning to evening.
Future Perfect Simple and Future Perfect Continuous
- We use the future perfect simple to focus on the results of events that will happen or finish before a time in the future.
- By the time they’ve reached 20, they will have watched more than 15,000 hours of television!
- We use the future perfect to measure lengths of time (usually with for) before a point in the future. We use the future perfect simple for states and future perfect continuous for activities. With some verbs (live, work, study), both versions are possible.
- In October she’ll have been working here for 30 years.
- OR In October she’ll have worked …
- We often use by or by the time with the future continuous, the future perfect simple and the future perfect continuous.
- By the age of 20, a large number of today’s teenagers will be suffering from obesity.
- By the time you arrive, the match will have started.
Source: Active Grammar, Level 3, Mark Lloyd and Jeremy Day, CUP, 2011 (With Ramrowriter’s adaptation where necessary)
Ramrowriter 
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