which verb form is used to indicate the perfect progressive tense?
Past perfect progressive tense ... had been and the present perfect of the verb (the verb form ending ... Read more. Positive: 63 %. Uses of English verb forms ... use a verb form identified with the subjunctive mood. ... combines perfect progressive aspect with past tense. Read more. Positive: 58 %. The perfect tenses are used to show actions ... The perfect progressive tenses are used to show actions that ...