... 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....
... has been”) Vậy thì ai làm nhỉ. Present perfectandpast (2) Unit 14. Present perfectandpast (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? Pastsimple (did) I did a lot of work yesterday. Hôm qua tôi đã làm nhiều việc. Chúng ta dùng thì simplepast khi đề cập tới một thời điểm đã kết thúc...
... waiting. We’ve been waiting for an hour. Present perfect continuous andsimple Unit 10. Presentperfect continuous andsimple A Nghiên cứu ví dụ sau: Ann’s clothes are covered ... Đừng quấy rầy tôi bây giờ. Tôi đang làm việc. Presentperfect continuous & Presentperfect continuous andsimple Unit 9. Presentperfect 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...
... They’ve played tennis three times this week. Unit 10. Presentperfect continuous and simple Unit 10. Presentperfect continuous andsimple 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 presentperfectsimple (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 presentperfect continuous (thì hiện tại hoàn thành tiếp diễn): Ở đây chúng ta quan tâm đến hành động...
... TOPIC 2: OUR PAST PERIOD 8: PRESENT SIMPLE, PASTSIMPLEAND PREPOSITIONS OF TIMEA. Theory:1. Presentsimpleandpast 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 presentsimple 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...
... 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 presentperfect to talk about something ... the presentperfect 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 pastand continues into the present (and may continue into the future).future1975 past nowsince 1975.has been CEO Gates has programmed...
... 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...
... 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...
... Harvesting Technologies – Past, Presentand 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,...
... Harvesting Technologies – Past, Presentand 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...