... 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 too late. I go now. 3. ... leaving. I hope you ….…… …………………………… (come) back and (see) ….…… …………………………… us soon 2. I think she (buy) ….…… ……………………………a new dress for her next birthday. 3. The ambulance is coming. I (wave) ….…… ... 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...
Ngày tải lên: 08/07/2013, 01:27
... 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/ ... 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 ... BETWEEN + time and time B. Exercises: I. Put the verbs in the present simple tense 1. We often (do) ____________ homework after dinner. 2. Nam (not watch) ____________ at home at night. 3. ______Mr.Hoa...
Ngày tải lên: 09/07/2013, 01:26
Tài liệu Past simple (Thì quá khứ đơn) pdf
... Past simple (Thì quá khứ đơn) Simple Past là thì quá khứ đơn. Để viết câu ở thì Simple Past ta chia động từ ở dạng past của nó. Hầu hết các động từ khi ... hold :held to meet :met to stand :stood to mean :meant to read /rid/ :read /red/ to sit :sat to take :took to think :thought * Chúng ta dùng thì Simple Past để chỉ một sự việc đã xảy ... herself It itself Số nhiều We ourselves You yourselves They themselves Ví dụ: Tom is shaving and he cuts himself. (không phải he cuts him) (Tom đang cạo râu và anh ta cắt phải mình). The...
Ngày tải lên: 19/01/2014, 17:20
Sustainable Energy Harvesting Technologies Past Present and Future Part 7 pdf
... Technologies – Past, Present and Future 118 () 23 23 23 2 1 23 () () () 2 Bi Te c Bi Te c Bi Te h c c c c IR T Q TTI K TTT Q Q Q α ⋅ = ⋅⋅− − ⋅−=−− (15) () 23 23 23 2 1 23 () () () 2 Bi ... Rtym_rmc 22 0 1 Gqc2 500 100 POLY(2) 22 0 30 0 0 0 0 0 0 0 0 0 0 0.5 Gkmc 0 33 POLY(1) 100 0 174m 290u 7.25u Rtym_kmc 33 0 1 Gqc3 500 100 POLY (3) 33 0 200 0 100 0 0 0 0 0 0 1 -1 Electrothermal ... by (9). In (10) and (11), boundary conditions for interfaces between heat source and Al 2 O 3 as well as Al 2 O 3 and copper strips are presented. 2 2 0 dT dx = (9) 23 23 0 A lO AlO x dT...
Ngày tải lên: 19/06/2014, 08:20
Sustainable Energy Harvesting Technologies Past Present and Future Part 9 pdf
... [mA*hrs] / 0. 036 8 [mA] ≈ 3. 10 years. If using battery of 30 mAh capacity for average current of 36 .80 μA consumption, calculated life expectancy = 30 [mA*hrs] / 0. 036 80 [mA] ≈ 33 .97 days. If ... 30 mAh flexible primary battery, calculated life expectancy of flexible battery will be: Duration = 30 [mA*hrs] / 0.14 [mA] ≈ 8. 93 days 5.2 .3 Voltage regulation The voltage regulator, LTC3525 -3. 3 ... I o = 30 0 mV *36 μA= 10.8 μW. Efficiency of the boost converter, η = 10.8 μW/19 μW ≈ 60%. At 32 0 lux, G = 32 0/120 ≈ 2.67 W/m 2 . 162 Sustainable Energy Harvesting Technologies – Past, Present and...
Ngày tải lên: 19/06/2014, 08:20
Sustainable Energy Harvesting Technologies Past Present and Future Part 14 pdf
... 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 ... Theory and Tech., Vol. 40, No. 12., pp. 235 9- 236 6, Dec., 1992 [7] Mikeka, C.; Arai, H. ; Georgiadis A. ; and Collado A. (2011). DTV Band Micropower RF Energy-Harvesting Circuit Architecture and ... with WLAN at 2.4 GHz (ISM band). An ISM band sleeve antenna is used for the transmission. Using the cellular band rectenna shown and discussed in Section 2.5.1, at least 3. 14 V is stored in the...
Ngày tải lên: 19/06/2014, 08:20
Present simple and Present continuous pot
... qickly that I ___ (not understand) him. A. speaks/ don’t understand B. is speaking/ don’t understand C. speak/ doesn’t understand D. is speaking/ am not understanding. 10. I’m going for a walk. ... come B. Do/ come C. Is/ coming D. Is/ coming. Present simple and Present continuous ( Hiện tại đơn và hiện tại tiếp diễn) Present simple Present continuous Use + Diễn tả thói quen ở hiện tại. + Chỉ ... ( Cô ấy là 1 người tối, luôn giúp đỡ mọi người xung quanh) C. is saying/is doing D. says/do. 3. - I’m afaird I’ve broken one of your coffee cups. - Don’t worry. I ___ (not like) that set anyway. A....
Ngày tải lên: 27/06/2014, 04:20
Present simple and Present continuous ( Hiện tại đơn và hiện tại tiếp diễn) pot
... B. is speaking/ don’t understand C. speak/ doesn’t understand D. is speaking/ am not understanding. 10. I’m going for a walk. ___ you ___ (come) with me? A. ... come C. Is/ coming D. Is/ coming. 1. Be quiet! The baby…. (slep). 2. We seldom… (eat) before 6 :30 . 3. It… (rain) now. 4. Look! The bus… ( leave). 5. The sun… (set) in the West. 6. Look! A man… ... buys/win D. buy/win 9. He usually ___ (speak) so qickly that I ___ (not understand) him. A. speaks/ don’t understand ...
Ngày tải lên: 27/06/2014, 11:20
The Simple Past Tense and The Past Continuous Tense
... 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
past continuous or past simple
... same time in the past. Eg. Mark was reading a book and Tony was watching television. BE CAREFUL!!!! The past continuous and the past simple are often used together. The past simple interrupts ... action of the past continuous. Eg. I was watching television when my friend arrived. BE CAREFUL!!!! The past continuous and the past simple are often used together. The past simple interrupts ... Marge/cake/make 3. Sleep/Bart 4. The Simpsons/watch/television 5. Homer/shower/have 6. Marge and Homer/dance We use the past continuous to talk about an action that started in the past but not...
Ngày tải lên: 31/08/2013, 01:10
Tài liệu Past simple & Past continuous doc
... you too tired? Past simple & Past continuous Unit 5. Past simple A Xem xét ví dụ sau: Wolfgang Amadeus Mozart was an Austrian musician and composer. He lived from 1756 ... enjoy? I didn’t enjoy Past continuous A Hãy xem ví dụ sau: Yesterday Karen and Jim played tennis. They began at 10 o’clock and finished at 11 .30 . So, at 10 .30 they were playing tennis. ... to her but she wasn’t looking. C So sánh thì past continuous - quá khứ tiếp diễn (I was doing) và past simple - quá khứ đơn (I did): Past continuous (đang ở giữa hành động) I was walking...
Ngày tải lên: 22/12/2013, 19:18
Sustainable Energy Harvesting Technologies Past Present and Future Part 3 pptx
... power between 0.1 and 0.8mW was obtained at wind speeds ranging between 7.5 and 12.5m·s -1 . 4 .3 Energy harvesting with a Helmholtz resonator 4 .3. 1 Principles A Helmholtz resonator is a gas-filled ... the movable mass. The resonant frequency of the device was successfully tuned between 180Hz and 130 Hz. The output voltage dropped with increasing resonant frequency. 2.4 .3 Variable spring stiffness ... attached to an actuator and placed axially in line with the cantilever. The Sustainable Energy Harvesting Technologies – Past, Present and Future 32 once the resonant frequency is matched...
Ngày tải lên: 19/06/2014, 08:20
Past simple: regular and irregular verbs ppt
... 2. David ___________ (not hurt) his knee. 3. I kicked the ball and it ___________ (break) a window. Past simple: regular and irregular verbs. Exercises A. Complete the sentences. Ejemplo: ... ________ some pasta and ________ some juice. 7. After lunch I ________ for a few hours, I ________ tired! H. Complete with past simple (regular verbs). 1. I opened the door and ___________ ... ____________ (travel) to Ireland last summer. B. Write the past simple of these verbs. 1. copy __________ 2. revise __________ 3. cycle __________ 4. listen __________ 5. practice __________...
Ngày tải lên: 27/06/2014, 21:20
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