Video shows what future perfect means. A tense that expresses action completed at some time in the future; in English it is formed by use of will have (or sh... Video shows what future perfect means. A tense that expresses action completed at some time in the future; in English it is formed by use of will have (or shall have) and a past participle. Future perfect Meaning. How to pronounce, definition audio dictionary. How to say future perfect. Powered by MaryTTS, Wiktionary