past perfect and past perfect continuous exercises doc

... 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 ... viết 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....

Ngày tải lên: 19/01/2014, 17:20

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Ngày tải lên: 28/08/2014, 16:40

... hiện tại anh ta không nhất thiết phải đang ở Hà nội) . Present Perfect (Thì Hiện tại hoàn thành) and Present Perfect Continuous (Thì Hiện tại hoàn thành tiếp diễn) ·Dùng với: now that ... you been crying for long time? Mắt của em đỏ. Có phải em đã khóc rất lâu không? Present Perfect Continuous Công thức: Subject + have/has + been + V-ing Trong đó:  Have: dùng với các ngôi: ... have written our reports already. Chúng tôi đã viết xong báo cáo Present Perfect Công thức: Subject + have/has + PP (PP: past participle – quá khứ phân từ) trong đó :  Have: dùng với các ngôi:...

Ngày tải lên: 02/03/2014, 15:18

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Ngày tải lên: 14/08/2014, 15:22

Ngày tải lên: 08/08/2014, 10:22

... ………………………………………………………………………………………………… TOPIC 2: OUR PAST PERIOD 8: PRESENT SIMPLE, PAST SIMPLE AND PREPOSITIONS OF TIME A. Theory: 1. Present simple and past simple: Tenses Affirmation Negation Interrogation Present ... morning, Tuan and his father go jogging around Xuan Huong Lake. Hoa and her mother walked along Bui Thi Xuan Street and then visited the flower garden. Hoa liked it very much and the flowers ... ……………………………………………………………………………………………… ……………………………………………………………………………………………… ………………………….…………… V. Read the passage and answer question below: In the summer holidays, Mr. Hung, Mrs. Chi and their children, Tuan and Hoa often go to the beach for two or three...

Ngày tải lên: 09/07/2013, 01:26

... Sentences in Present Perfect Simple 1. Bob / visit / his grandma 2. Jimmy / play / on the computer 1 Questions Put the verbs into the correct tense (simple past or present perfect simple). 1. ... restaurant three times yet. And on my mum's birthday, we (order) some sushi and (have) it at home. Form Write down the correct form (pronoun + verb). Simple Past Present Perfect Simple she / ... 10. B: I (be / not) to Australia yet. Simple Past or Present Perfect Simple Exercise 3 Put the verbs into the correct tense (simple past or present perfect simple). 1. A: (you / be / ever) to...

Ngày tải lên: 15/09/2013, 00:10

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

Ngày tải lên: 30/10/2013, 14:11

... iterator and can thus be iterated over: for (let x of iterTree([[0, 1], 2])) { console.log(x); 18 | The Past, Present, and Future of JavaScript } }; let proxy = Proxy({}, handler); Using the handler: $ ... number formatting, and date and time formatting, and lets applications choose the language and tailor the functionality to their needs. Conclusion JavaScript is a versatile and flexible language. ... Wirfs-Brock. Presentation on InfoQ. 34 | The Past, Present, and Future of JavaScript quasiHandler("Hello ", firstName, " ", lastName) The actual handler invocation is a bit more complex....

Ngày tải lên: 24/03/2014, 04:21

... Technologies – Past, Present and Future 66 1.4.2 Four magnets vibrational generators In this chapter rectangular shape four magnets and single coil generator structure is used for macro and micro ... acceleration or force and frequency are available and whether macro or micro size magnet and coil would generate sufficient power. Also what kind of generator structure such as magnet, coil and suspension ... And , B.; Baglio, S. and Trigona, C. (2009). Improved Energy Harvesting from Wideband Vibrations by Nonlinear Piezoelectric Converters, Proceedings of Eurosensors XXIII, Lausanne, Switzerland,...

Ngày tải lên: 19/06/2014, 08:20

... Analysis (FEA) in order to understand the spring forces which exist between the fixed and moving magnets and to understand the flux linkage with the coil. Figures 39 (a) and (b) show the results of ... Transformer and Inductor Design Handbook, Colonel W.T. McLyman, Second Edition, Marcel Dekker Inc.New York, 1988. [16] Electromagnetic and Electromechanical machine, Leander W. Matsch, and J. Derald ... and air compressor unit were measured in different positions of the machines for the VIBES project [5], [33]. Figure 35, 36 and 37 show the vibration spectrum of an industrial fan and top and...

Ngày tải lên: 19/06/2014, 08:20

... automobiles and aeroplanes and structures such as buildings and bridges. Also human and Vibration Energy Harvesting: Linear and Nonlinear Oscillator Approaches 177 where K V and K c are ... Harvesting Technologies – Past, Present and Future 172 3. Micro energies for micro devices and below An interesting limiting case of kinetic energy present in the form of random vibration is represented ... dynamics of the mass and is usually expressed as the sum of its kinetic and potential energy: when the spring is completely extended (or compressed), the mass is at rest and all the dynamic...

Ngày tải lên: 19/06/2014, 08:20

... Energy Harvesting Technologies – Past, Present and Future 56 magnetic spring generator which has been built and tested for human body motion is presented and discussed the advantages of this ... And , B.; Baglio, S. and Trigona, C. (2009). Improved Energy Harvesting from Wideband Vibrations by Nonlinear Piezoelectric Converters, Proceedings of Eurosensors XXIII, Lausanne, Switzerland, ... phenomenon, In: Smart Materials and Structures, Vol.20, 055022 (10pp), ISSN 0964-1726 Sustainable Energy Harvesting Technologies – Past, Present and Future 58 materials and diamagnetic materials....

Ngày tải lên: 19/06/2014, 11:20

... integral over the DTV band (1), and is significantly larger than in the case of narrow band cellular energy harvesting. Sustainable Energy Harvesting Technologies – Past, Present and Future 238 ... band as well as DTV band. The key issue in RF energy harvesting is the RF-to-DC conversion efficiency and is discussed in Section 2.3, whereas Section 2.4 and 2.5 present the design of DTV and ... antenna DTV band rectifier Fig. 10. Generic version of our proposed DTV energy harvesting circuit. Sustainable Energy Harvesting Technologies – Past, Present and Future 236 these frequency bands....

Ngày tải lên: 19/06/2014, 11:20