Tenses Questions
The future perfect tense is used to describe an action that will be completed before a specific point in the future. It is formed by using "will have + past participle." For example, "By the time she arrives, I will have finished my work."
On the other hand, 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 is formed by using "have/has been + present participle." For example, "I have been studying for three hours."
In summary, the future perfect tense focuses on the completion of an action before a specific future point, while the present perfect continuous tense emphasizes the ongoing nature of an action from the past to the present.