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ESL Grammar Practice: Present Perfect Progressive Tense
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日期：2025-06-28
"Green Apples" by Paul Cezanne, 1873 The Present Perfect Progressive Tense is formed by using the subject with "have been" or "has been" plus a present participle (-ing form) of the verb. If you're using a subject pronoun, you may use a contraction. The ....看更多
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