The tense of the italicized verb 'have moved' would be present perfect as it denotes a past event/action having its present consequences. <u>Present perfect tense primarily functions to express the actions that took place before now at an unspecified time</u>. It combines the present(through use of 'have') and past(by showing perfection or completion of the action 'moved') and that's how it signals the association between the past and the present. Thus, <em>the use of 'have' followed by past participle signals that present perfect tense is employed in the sentence</em>.
Aimee Mullins has difficulty walking across the floor because she is walking on five-inch heels but doesn't have any ankles due to her legs being amputated at an early age.
