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English definition of “the future perfect”

the future perfect

noun [S]    
the form of the verb that is used to show that an action will have been performed by a particular time . In English it is formed by 'will have' or 'shall have' and a past participle : In the sentence 'By that time I will have finished ' the verb phrase 'will have finished ' is in the future perfect .Verb forms, tenses and types of verbs Grammar:Future perfect continuous (I will have beenworking here ten years)Grammar:Future perfect continuous: formWe use will/shall + have + been + the -ing form of the verb.Grammar:Future perfect continuous: useGrammar:Future perfect simple (I will have worked eight hours)Grammar:Future perfect simple: formWe use will/shall + have + the -ed form of the verb.Grammar:Future perfect simple: use
(Definition of the future perfect noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)
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