
1) The future perfect tense
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https://www.crosswordclues.com/clue/future-perfect

The future perfect is a verb form or construction used to describe an event that is expected or planned to happen before a time of reference in the future, such as will have finished in the English sentence `I will have finished by tomorrow.` It is a grammatical combination of the future tense, or other marking of future time, and the perfect, a.....
Found on
http://en.wikipedia.org/wiki/Future_perfect

[
n] - a perfective tense used to describe action that will be completed in the future
Found on
http://www.webdictionary.co.uk/definition.php?query=future%20perfect

perfect with respect to a temporal point of reference in time to come; completed with respect to a time in the future, esp. when incomplete with respect to the present. · noting or pertaining to a tense or other verb formation or construction with such reference. · the future perfect tense. · another verb formation or construction...
Found on
https://www.infoplease.com/dictionary/future-perfect
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