past perfect and past simple exercise pdf

... recently, don’t you think? 6 My grandfather died 30 years ago. I (never/meet) him. 4. Fill in the blanks with modals: must - have to - ought to - used to 1. You wash your hands before meals. 2. It’s ... seventeen. In the play, she must appear in a bright red dress and long black stockings. Last year in another play, she had to wear short socks and a bright, orange-colored dress. If anyone asks her ... the party? 7. There are many clouds in the sky. It (rain) ….…… …………………………… 6. Read the passage and answer the following questions: My aunt Nhan is an actress. She must be at least thirty-five....

Ngày tải lên: 08/07/2013, 01:27

... been”) Vậy thì ai làm nhỉ.      Present perfect and past (2) Unit 14. Present perfect and past (2) A Chúng ta không dùng thì present perfect (I have done) khi nói về một thời điểm ... khứ ( present perfect và past simple) qua các câu sau: Present perfect (have done) I’ve done a lot of work today. Hôm nay tôi đã làm nhiều việc. Chúng ta dùng thì present perfect khi đề ... “have you done”). Bạn đã bị như thế nào? Past simple (did) I did a lot of work yesterday. Hôm qua tôi đã làm nhiều việc. Chúng ta dùng thì simple past khi đề cập tới một thời điểm đã kết thúc...

Ngày tải lên: 19/01/2014, 17:20

... load and constant temperature gradient ∆T. 4 Modeling and Simulation of Thermoelectric Energy Harvesting Processes Piotr Dziurdzia AGH University of Science and Technology in Cracow Poland ... Peltier effect Q c1 and Q h1 , Joule heat Q c2 and Q h2 , heat conduction Q c3 and Q h3 . In case of the Joule heat it is assumed that one half of it dissipates at the cold side and the other half ... Sustainable Energy Harvesting Technologies – Past, Present and Future 116 resistive load R L , the voltage V S forces a Peltier current I flow, and in consequence there appears a Joule heat...

Ngày tải lên: 19/06/2014, 08:20

... Circuits and Systems, vol.2, no.4, pp.251-259, 2008. 168 Sustainable Energy Harvesting Technologies – Past, Present and Future 14 Sustainable Energy Harvesting Technologies: Past, Present and Future At ... Energy Harvesting Technologies – Past, Present and Future 10 Sustainable Energy Harvesting Technologies: Past, Present and Future 4. Hybrid flexible energy harvesting and energy storage The proposed ... Technologies – Past, Present and Future Wearable Energy Harvesting System for Powering Wireless Devices 5 Barbic et al. (1999), rated voltage at about 1.5 V and capacity of ≈ 30 mAh) in prototype and to...

Ngày tải lên: 19/06/2014, 08:20

... http://www.secomtel.com/UpFilesPDF /PDF/ Agilent /PDF_ DOCS/SKYDIODE/ 03_ SKYDI/HSMS2850 .PDF (Last accessed on 13 July, 2011) [6] McSpadden, J. et al., H. (1992). Theoretical and Experimental Investigation ... temperature sensor with WLAN at 2.4 GHz (ISM band). An ISM band sleeve antenna is used for the transmission. Using the cellular band rectenna shown and discussed in Section 2.5.1, at least 3.14 ... Harvesting Technologies – Past, Present and Future 254 The transmitter consists of one-chip microcomputer (MCU) PIC16F877A and wireless module nRF24L01P for the control, and MCU can be connected...

Ngày tải lên: 19/06/2014, 08:20

... làm nhỉ. He lost his key (past simple) but now he has found it ( present perfect) . Anh ấy đã làm mất chìa khóa nhưng bây giờ anh ấy đã tìm ra. Thì present perfect là thì hiện tại hoàn ... sách). C Chúng ta dùng thì present perfect để đưa ra những thông tin mới (xem UNIT 7). Nhưng nếu chúng ta tiếp tục nói về điều đó, chúng ta dùng thì past simple: A: Ow! I’ve burnt myself. Ối! ... lost his key” = hiện giờ anh ấy không có chiếc chìa khóa của anh ấy. (xem UNIT 7). Còn thì past simple cho chúng ta biết về quá khứ. Nếu có ai đó nói rằng: “Tom lost his key” chúng ta không...

Ngày tải lên: 22/06/2014, 21:20

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Ngày tải lên: 08/08/2014, 13:22

... 4. The past continuous tense : ( thì quá khứ tiếp diễn ) _ Formation : ( công thức ) S + was / were +...

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Ngày tải lên: 11/08/2014, 12:21

... most typical and easiest tasks are near the top of the section. IELTS Speaking Part Two tasks about the past (Past Simple, Past Continuous, Present Perfect Simple, Present Perfect Continuous, ... about the Past, Present and Future The most challenging and least likely tasks in the exam are the tasks that are mainly about the future (towards the bottom below), with the easiest and most ... Continuous, “used to” and Past Perfect) Describe a gift you gave someone You should say: - Who you gave it to - What the occasion was - Why you chose that present And say if you think...

Ngày tải lên: 04/10/2012, 11:45

... bed last night. S 1 + Simple Past + after + S 2 + Past Perfect EX: George went to bed after he had seen this movie last night. S 1 + Past Perfect + when + S 2 + Simple Past EX: When I came ... khứ. EX: John had traveled to England before 2000. 2. Một hành động xảy ra trước một hành động khác trong quá khứ. S 1 + Past Perfect + before + S 2 + Simple Past EX: George had seen this movie ... PAST PERFECT TENSE (THÌ QUÁ KHỨ HOÀN THÀNH) I/ Use (Cách dùng) Past Perfect Tense được dùng để diễn tả: 1. Một hành động xảy ra trước...

Ngày tải lên: 18/08/2013, 02:10