Luyện ngữ pháp - English Grammar for Academic Purposes (Chapter 2: Time Travel))


IV. USING THE PERFECT CONTINUOUS TENSE FOR TIME

3.0 Non-Action Verbs

Like with the Continuous Tense, we don't use the Perfect Progressive for verbs that are non-action (used to describe something) because action in the continuous tense is for a limited time.

Non-action verbs are used for descriptions of something or a situation, things that are relatively permanent.

- 2. The Perfect Continuous Tenses Connects Two Points of Time, Actions or Situations - 4. Adverbs of Frequency


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