If you want to know more, here is an article about a tweak that will do it. http://www.idownloadblog.com/2012/10/06/ipad-mouse/. Though the article is old, the tweak it described still works on iOS 8.4. You can also connect a keyboard and mouse at the same time, and the iPad will display a cursor for the mouse.
Have + been + verb + -ing. The _______ is used for an event that has been completed before the present moment in time. Simple past. When a progressive tense is used in the independent clause, the dependent clause typically uses the _______ tense. Simple past. Read the quotation below and complete the instruction that follows.
Past perfect progressive tense ... had been and the present perfect of the verb (the verb form ending ... Uses of English verb forms ... use a verb form identified with the subjunctive mood. ... combines perfect progressive aspect with past tense. The perfect tenses are used to show actions ... The perfect progressive tenses are used to show actions that ... information about verbs (tense, ... An explanation of the progressive perfect tense in Spanish ... Since progressive verbs are used to indicate that ... the verb form that (with ...