The form of the "will/shall" future described above is frequently called the "simple future" (or "future simple"). Other constructions provide additional auxiliaries that express particular aspects: the "future progressive" (or "future continuous") as in "He will be working"; the "future perfect" as in "They will have finished"; and the "future perfect progressive" as in "You will have been practising." For detail on these, see the relevant sections of Uses of English verb forms. (For more on expressions of relative tense, such as the future perfect, see also the section above.)