She has been studying for hours.
Main verb phrase: has been studying
Analysis:
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Tense: Present
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Aspect: Perfect Progressive (also called Perfect Continuous)
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Mood: Indicative (used to state a fact)
Tense: Present
Word(s) indicating tense: has
Aspect: Perfect Progressive (Perfect Continuous)
Word(s) indicating aspect: has been (perfect) + -ing form studying (progressive)
Mood: Indicative
Word(s) indicating mood: The sentence structure (not a specific word)