劍橋詞典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 將來完成時(shí) In the sentence "By that time I will have finished " the verb phrase "will have finished " is in the future perfect . 在句子 By that time I will have finished 中，動(dòng)詞短語 will have finished 用的是將來完成時(shí)。 例句 In the sentence "On 14 October I will have worked here ten years ", there is an example of the future perfect .The future perfect is formed by putting 'will have' before the past participle of the verb . 返回 the future perfect