Make sentences in the present perfect affirmative or negative,using these past participles. [done,lost,stopped,arrived,built,put,made,changed]. 1.I can't find my mobile.I think I.........it. 2.This isn't right.He.............a mistake. 3.I can't go to beed.I........... my homework. 4.Martin and Lizzie are here but Jay.......... 5.Look!They....... a little house in the tree.