Tham khảo tài liệu 'focus of present perfect 3', ngoại ngữ, anh ngữ phổ thông phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | D I have been doing or I have done Unit 17 PRESENT PERFECT CONTINUOUS We use the present perfect continuous for an action over a period of time leading up to the present. We are thinking of the action going on. Daniel s tired. He s been working. I ve been reading all afternoon. We ve been staying here for a week since Thursday. PRESENT PERFECT We use the present perfect simple for a complete action. We are thinking of the result. At least he s earned some money. I ve read 200 pages. E I was doing or I did Unit 10 PAST CONTINUOUS We use the past continuous for an action that we were in the middle of. was reading the paper at half past ten. PAST SIMPLE We use the past simple for a complete action in the past or for a past state. I left the house at half past ten. Vicky had a headache. We often use the past continuous and simple together when a shorter action simple comes in the middle of a longer one continuous . We were looking for the coffee bar when we met Emma. But we use two past simple verbs for one action after another. When we saw Rachel she waved to us. F I did or I had done Units 18-19 We use the past simple to talk about a past situation and the past perfect for things that happened earlier. I threw the magazine away. I d finished with it. When Sarah found the letter someone had already opened it. When the new people moved in the house had been empty for a year. We can use when . had done to say that one thing finished and then something else happened. When we d paid the bill we left the restaurant. But when one short action comes straight after another we use the past simple for both. When the firework went off the dog ran away. Compare these two sentences. When we arrived the others all left. We arrived and then they left. When we arrived the others had all left. They left before we arrived. G I had been doing or I had done Unit 20 We use these forms when we look back from a situation in the past. PAS PERFECT CONTINUOUS We use the past perfect continuous
