OXFORD PRACTICE GRAMMAR-20 sau đây là giáo trình lý thuyết tiếng anh và bài tập áp dụng từ cơ bản đến nâng cao , nhằm giúp các bạn có thể tự mình ôn tập và củng cố thêm về nền tảng kiến thức môn Anh văn , tự tin đạt kết quả tốt trong kỳ thi ngoại ngữ | OXFORD PRACTICE GRAMMAR 20 THE PAST PERFECT CONTINUOUS A Introduction David is talking about a situation in the past Ifell and broke my leg . When we look back to something before this past time we use the past perfect simple see Unit 18 or the past perfect continuous. Past perfect simple 1 had taken a bus into town. Past perfect continuous had been swimming in the pool We use the past perfect continuous for an action which happened over a period of time. The swimming went on for some time before David broke his leg. B Form The past perfect continuous is had been an ing-form. had been waiting ages OR I d been waiting ages. I had not been paying attention OR hadn t been paying attention. Was the ground wet Had it been raining C I had been doing or I had done Compare the past perfect continuous and simple. OVER A PERIOD had been doing found the calculator. I d been looking for it for ages. Vicky felt tired because she d been working all day. We are thinking of Vicky s work going on as she got tired. We normally use the continuous with a phrase saying how long. When the company went bankrupt it had been losing money for months. We do not normally use the past perfect continuous for states see Unit 7 . NOT He had been-seeming unwell COMPLETE had done I finally bought a new calculator. I d looked everywhere for the old one. Vicky felt pleased because she d done so much work. We are thinking of Vicky s work as complete. We normally use the simple form with a phrase saying how much many. When the company went bankrupt it had lost over a million pounds. We also use the past perfect simple for states see Unit 7 . The old man had seemed unwell for some time before he died. D Comparison with other continuous forms Compare the present perfect continuous has have been doing and the past perfect continuous. Vicky looks very upset. I think she s been .
