... 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....
... 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 ... 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 đề ... “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...
... load and constant temperature gradient ∆T.
4
Modeling and Simulation of Thermoelectric
Energy Harvesting Processes
Piotr Dziurdzia
AGH University of Science and Technology in Cracow
Poland ... Peltier effect Q
c1
and Q
h1
, Joule
heat Q
c2
and Q
h2
, heat conduction Q
c3
and Q
h3
. In case of the Joule heat it is assumed that one
half of it dissipates at the cold side and the other half ...
Sustainable Energy Harvesting Technologies – Past, Present and Future
116
resistive load R
L
, the voltage V
S
forces a Peltier current I flow, and in consequence there
appears a Joule heat...
... 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 ... Technologies – Past, Present and Future
Wearable Energy Harvesting System for Powering Wireless Devices 5
Barbic et al. (1999), rated voltage at about 1.5 V and capacity of ≈ 30 mAh) in prototype and
to...
... 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 ...
temperature sensor 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 ... 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...
... 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 ...
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.
Ối! ... lost his key” = hiện giờ anh ấy không có chiếc chìa khóa
của anh ấy. (xem UNIT 7).
Còn thì pastsimple cho chúng ta biết về quá khứ. Nếu có ai đó nói rằng:
“Tom lost his key” chúng ta không...
...
most typical and easiest tasks are near the top of the section.
IELTS Speaking Part Two tasks about the past (Past Simple, Past Continuous,
Present Perfect Simple, Present Perfect Continuous, ... about the Past, Present and Future
The most challenging and least likely tasks in the exam are the tasks that are mainly about
the future (towards the bottom below), with the easiest and most ... Continuous, “used to” andPast Perfect)
Describe a gift you gave someone
You should say:
- Who you gave it to
- What the occasion was
- Why you chose that present
And say if you think...
... bed last night.
S
1
+ SimplePast + after + S
2
+ PastPerfect
EX: George went to bed after he had seen this movie last night.
S
1
+ PastPerfect + when + S
2
+ Simple Past
EX: When I came ... khứ.
EX: John had traveled to England before 2000.
2. Một hành động xảy ra trước một hành động khác trong quá khứ.
S
1
+ PastPerfect + before + S
2
+ 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...