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.
In terms of verb tense, in the conclusion you use the present (simple) tense when you present facts, and you use the past tense or present perfect when you refer to the research that you have done. Example 2: Verb tense in the dissertation conclusion.