Why is present perfect progressive tense used in the second sentence? In my understanding, it should be present perfect simple as the speaker ... ... <看更多>
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Why is present perfect progressive tense used in the second sentence? In my understanding, it should be present perfect simple as the speaker ... ... <看更多>
QUIZ: https://shawenglish.com/quizzes/12- tenses -english-grammar-quiz/Learn the Past Tense, Present Tense, and Future Tense in this English ... ... <看更多>