When You Should Use the Future Perfect Continuous
Use the future perfect continuous to project yourself into the future for the duration of an ongoing activity from now up to a point in the future.
 The ongoing activity will be completed by a certain point in time (in the future). 
                        subject ( I ) + auxiliary (will ) + auxiliary (have) + auxiliary (been) + verb -ing (studying) 
 This tense is used with action verbs like washing, studying, and practicing. For more features to Table 1. Future Perfect Continuous.  
 
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