... 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 ... 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....
... 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 ... 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. ... They went out after lunch and they’ve just come back. (= they are come back now). Sau bữa trưa họ đã đi ra bên ngoài và bây giờ họ vừa quay về. B Thì present perfect không được dùng nếu...
... trước đây, 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 ... 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: ... tuy không đề cặp nhưng có thể hiểu là anh ấy vẫn còn tiếp tục dạy) Các từ hay đi cùng với Present Perfect Since / forAlready / Not yetEver / neverNow that Dùng để chỉ một hành động...
... 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...
... last night.S1 + Simple Past + after + S2 + PastPerfect EX: George went to bed after he had seen this movie last night.S1 + PastPerfect + when + S2 + Simple Past EX: When I came back ... khứ. EX: John had traveled to England before 2000.2. Một hành động xảy ra trước một hành động khác trong quá khứ.S1 + PastPerfect + before + S2 + Simple Past EX: George had seen this movie ... PASTPERFECT 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...