present perfect simple and past perfect exercises pdf
Difference between past continuous and past perfect continuous tenses
Ngày tải lên: 11/07/2015, 13:26
TChon 15 PRESENT PERFECT AND PAST SIMPLE TENSE.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
Tài liệu Present perfect and past doc
... has 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 ... quá 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 ... “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
Tài liệu Present perfect continuous & Present perfect continuous and simple pptx
... waiting. We’ve been waiting for an hour. Present perfect continuous and simple Unit 10. Present perfect continuous and simple A Nghiên cứu ví dụ sau: Ann’s clothes are covered ... Đừng quấy rầy tôi bây giờ. Tôi đang làm việc. Present perfect continuous & Present perfect continuous and simple Unit 9. Present perfect continuous A It has been raining. Xem ví ... problem and she thinks that … Mình vừa mới đề cập đến vấn đề của Carol và cô ấy nghĩ là … B It has been raining for two hours. Xét ví dụ sau: It is raining now. It began raining two hours ago and...
Ngày tải lên: 19/01/2014, 17:20
Unit 10. Present perfect continuous and simple doc
... They’ve played tennis three times this week. Unit 10. Present perfect continuous and simple Unit 10. Present perfect continuous and simple A Nghiên cứu ví dụ sau: Ann’s clothes are covered ... hoàn tất hay chưa. Ở ví dụ trên, hành động sơn tường chưa kết thúc. Has painted là thì present perfect simple (thì hiện tại hoàn thành): Ở thì này, điều quan trọng là sự hoàn thành của hành ... trước đây màu trắng. Bây giờ nó màu xanh. Cô ấy đã sơn trần nhà. Has been painting là thì present perfect continuous (thì hiện tại hoàn thành tiếp diễn): Ở đây chúng ta quan tâm đến hành động...
Ngày tải lên: 22/06/2014, 21:20
TCHON PERIOD 8 PRESENT SIMPLE, PAST SIMPLE AND PREPOSITIONS OF TIME.doc
... 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 simple S + am/ ... weekend/ … - AT + time/ weekends/ present/ this time/ the moment/ … - AFTER / BEFORE + time - BETWEEN + time and time B. Exercises: I. Put the verbs in the present simple tense 1. We often (do) ____________ ... 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...
Ngày tải lên: 09/07/2013, 01:26
Tài liệu ngữ pháp tiếng anh present perfect since and for
... â 2006 Pearson Education and its licensors. All rights reserved. Bill Gates has been CEO of Microsoft since 1975. Present Perfect Present Perfect Use the present perfect to talk about something ... the present perfect with since + point in time to show when something started. future 1975 past now since 1975. has written several books Present Perfect: Since and For Bill Gates and Microsoft 6 ... perfect to talk about something that began in the past and continues into the present (and may continue into the future). future 1975 past now since 1975. has been CEO Gates has programmed...
Ngày tải lên: 19/08/2013, 14:15
Đề tài " Classical and modular approaches to exponential Diophantine equations I. Fibonacci and Lucas perfect powers " pdf
... and (ii) are treated in Sections 5 and 6, respectively. Sections 7 and 8 are devoted to step (iii). Sections 9 and 10 are concerned with Steps (iv) and (v). Section 11 deals with steps (vi) and ... Classical and modular approaches to exponential Diophantine equations I. Fibonacci and Lucas perfect powers By Yann Bugeaud, Maurice Mignotte, and Samir Siksek* CLASSICAL AND MODULAR ... the perfect powers in the Fibonacci and Lucas sequences naturally reduces to the problem of solving the following pair of equations: F n = y p ,n≥ 0, and p prime,(5) and L n = y p ,n≥ 0, and...
Ngày tải lên: 06/03/2014, 08:21
Unit 5: Possibility and Probability Perfect Modals pdf
... has a lot of exams coming up soon, and he is also working on a term paper. He must have been studying at the library. Unit 5: Possibility and Probability Perfect Modals I. Possibility: May, ... room are turned off. She must be sleeping. (right now). Past time: MODAL + have been + v-ing Meaning: in progress at a time in the past. ã Ex 1 : Sue wasn’t at home last night when we went ... In negative sentences both must not and don’t have to (also don’t need to and need not) are used. Must not is used when the speaker expects or orders...
Ngày tải lên: 07/03/2014, 07:20
Sustainable Energy Harvesting Technologies Past Present and Future Part 7 pdf
... Harvesting Technologies – Past, Present and Future 120 ( ) 23 __ _ca cthhsthAlO thCu TTQR R R=+ + + (19) R th_hs is the thermal resistance represented by a heat sink and it takes into account ... relating to the thermal domain and represent heat powers Q c at the cold side (15), and Q h at the hot one (16), while the last one comes from the electrical domain and represents an electrical ... operation and are crucial for comprehensive understanding of heat to electric energy conversion. After that an analytical description of the heat flux and power generation in TEMs is presented,...
Ngày tải lên: 19/06/2014, 08:20
Sustainable Energy Harvesting Technologies Past Present and Future Part 9 pdf
... 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 ... aqueous 156 Sustainable Energy Harvesting Technologies – Past, Present and Future 12 Sustainable Energy Harvesting Technologies: Past, Present and Future Fig. 13. Voltage across PV panel Fig. 14....
Ngày tải lên: 19/06/2014, 08:20
Sustainable Energy Harvesting Technologies Past Present and Future Part 14 pdf
... 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 ... 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 ... integrated rectenna and DC-DC boost converter circuits. 1.6.1 DC-DC boost converter design theory and operation The DC-DC boost converter design theory and actual implementation are presented in...
Ngày tải lên: 19/06/2014, 08:20
