present perfect simple and past perfect exercises pdf

Past simple and past perfect tense exercise

Danh mục: Ngữ pháp tiếng Anh

Present perfect simple and continuous potx

Danh mục: Anh ngữ phổ thông

Difference between past continuous and past perfect continuous tenses

Danh mục: Ngữ pháp tiếng Anh

TChon 15 PRESENT PERFECT AND PAST SIMPLE TENSE.doc

Danh mục: Tiếng anh

... 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 to1. 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....

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Tài liệu Present perfect and past doc

Danh mục: Kỹ năng nói tiếng Anh

... 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...

Tài liệu Present perfect continuous & Present perfect continuous and simple pptx

Danh mục: Kỹ năng nói tiếng Anh

... 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...

Unit 10. Present perfect continuous and simple doc

Danh mục: Kỹ năng nói tiếng Anh

... 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...

Unit 13. Present perfect and past (1) doc

Danh mục: Kỹ năng nói tiếng Anh

Unit 14. Present perfect and past (2) doc

Danh mục: Kỹ năng nói tiếng Anh

BT Past Perfect and Present Perfect Continuous

Danh mục: Ngữ pháp tiếng Anh

TCHON PERIOD 8 PRESENT SIMPLE, PAST SIMPLE AND PREPOSITIONS OF TIME.doc

Danh mục: Tiếng anh

... TOPIC 2: OUR PAST PERIOD 8: PRESENT SIMPLE, PAST SIMPLE AND PREPOSITIONS OF TIMEA. 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 timeB. Exercises: I. Put the verbs in the present simple tense1. 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...

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Tài liệu ngữ pháp tiếng anh present perfect since and for

Danh mục: Ngữ pháp tiếng Anh

... 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.future1975 past nowsince 1975.has written several books Present Perfect: Since and ForBill Gates and Microsoft6 ... perfect to talk about something that began in the past and continues into the present (and may continue into the future).future1975 past nowsince 1975.has been CEO Gates has programmed...

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Đề tài " Classical and modular approaches to exponential Diophantine equations I. Fibonacci and Lucas perfect powers " pdf

Danh mục: Thạc sĩ - Cao học

... 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 followingpair of equations:Fn= yp,n≥ 0, and p prime,(5) and Ln= yp,n≥ 0, and...

Unit 5: Possibility and Probability Perfect Modals pdf

Danh mục: Kỹ năng nói tiếng Anh

... 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 ModalsI. Possibility: May, ... room are turned off. She must be sleeping. (right now). Past time:MODAL + have been + v-ingMeaning: in progress at a time in the past. ã Ex1: 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...

Sustainable Energy Harvesting Technologies Past Present and Future Part 7 pdf

Danh mục: Kĩ thuật Viễn thông

... Harvesting Technologies – Past, Present and Future 120 ()23__ _ca cthhsthAlO thCuTTQR R R=+ + + (19) Rth_hs is the thermal resistance represented by a heat sink and it takes into account ... relating to the thermal domain and represent heat powers Qc at the cold side (15), and Qh 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,...

Sustainable Energy Harvesting Technologies Past Present and Future Part 9 pdf

Danh mục: Kĩ thuật Viễn thông

... Circuits and Systems, vol.2, no.4, pp.251-259, 2008.168Sustainable Energy Harvesting Technologies – Past, Present and Future 14 Sustainable Energy Harvesting Technologies: Past, Present and FutureAt ... Energy Harvesting Technologies – Past, Present and Future 10 Sustainable Energy Harvesting Technologies: Past, Present and Future4. Hybrid ﬂexible energy harvesting and energy storageThe proposed ... aqueous156Sustainable Energy Harvesting Technologies – Past, Present and Future 12 Sustainable Energy Harvesting Technologies: Past, Present and FutureFig. 13. Voltage across PV panelFig. 14....

Sustainable Energy Harvesting Technologies Past Present and Future Part 14 pdf

Danh mục: Kĩ thuật Viễn thông

... 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...