Final answer:
The future perfect progressive tense is used to express ongoing actions up to a future point. It uses the auxiliary 'will have been' followed by the present participle of the main verb.
Explanation:
Future perfect progressive tense: The sentence 'She has been laughing' uses the future perfect progressive tense, indicating an action that will be ongoing up to a certain point in the future. This tense is formed with the auxiliary 'will have been' followed by the present participle of the main verb.
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