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We use the Present Perfect Continuous when we want to emphasize the duration or continuity of an action or event that started in the past and is still relevant to the present moment.
This tense indicates that an action or event has been ongoing for a period of time leading up to the present moment.
Form: has/have been + V+ing
For example: "She has been studying for two hours."
This sentence emphasizes the continuous nature of the studying activity, which started in the past and is still ongoing. The action of studying has been going on for two hours, and it is still continuing.
Signal words: "for", "since", "lately", "recently", "all day", "all week", "all morning" etc.
The Present Perfect Simple is used to express the result or consequence of a past action with relevance to the present, while the Present Perfect Continuous is used to emphasize the duration or continuity of an action or event that started in the past and is still ongoing in the present.
