Tenses Questions
The present perfect continuous tense is used to describe an action that started in the past, is still ongoing in the present, and may continue into the future. It emphasizes the duration or length of time of the action. Example: "I have been studying for three hours."
On the other hand, the present continuous tense is used to describe an action that is happening at the moment of speaking or around the present time. It emphasizes the temporary nature of the action. Example: "I am studying right now."
In summary, the main difference between the present perfect continuous and present continuous tenses is that the present perfect continuous focuses on the duration of an ongoing action that started in the past, while the present continuous focuses on an action happening at the present moment.