... 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....
... same time in the past.
Eg. Mark was reading a book and
Tony was watching television.
BE CAREFUL!!!!
The pastcontinuous
and the pastsimple
are often used
together.
The pastsimple
interrupts ... action
of the past
continuous.
Eg. I was watching
television when my
friend arrived.
BE CAREFUL!!!!
The pastcontinuous
and the pastsimple
are often used
together.
The pastsimple
interrupts ... at
the same time in the past.
Eg. Mark was reading a book and
Tony was watching television.
We use the pastcontinuous to
talk about an action that
started in the past but not
finished at...
... 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 ... real case:
1
,
2
and
3
are real numbers > 1, and the logarithms
of the α
i
’s are real (and > 0),
ã the complex case:
1
,
2
and
3
are complex numbers of modulus one,
and the logarithms...
... 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 Modals
I. Possibility: May, ... room are turned off. She must be sleeping. (right now).
Past time:
MODAL + have been + v-ing
Meaning: in progress at a time in the past.
ã Ex
1
: 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...
... TOPIC 2: OUR PAST
PERIOD 8: PRESENT SIMPLE, PASTSIMPLEAND PREPOSITIONS OF TIME
A. Theory:
1. Present simpleandpast 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 ...
………………………………………………………………………………………………
………………………………………………………………………………………………
………………………….……………
V. Read the passage and answer question below:
In the summer holidays, Mr. Hung, Mrs. Chi and their children, Tuan and Hoa often
go to the beach for two or three...
...
10. B: I (be / not) to Australia yet.
Simple Past or Present Perfect Simple
Exercise 3
Put the verbs into the correct tense (simple past or present perfect simple) .
1. A: (you / be / ever) to London? ... (can / concentrate / not) on the film.
Simple Past or Present Perfect Simple
Exercise 8
Put the verbs into the correct tense (simple past or present perfect simple) .
1. I (just / finish) my homework. ... Sentences in Present Perfect Simple
1. Bob / visit / his grandma
2. Jimmy / play / on the computer
1
Questions
Put the verbs into the correct tense (simple past or present perfect simple) .
1. (you...
... you too tired?
Pastsimple & Pastcontinuous
Unit 5. Past simple
A Xem xét ví dụ sau:
Wolfgang Amadeus Mozart
was an Austrian musician and composer. He lived from 1756 ... to her but she wasn’t looking.
C So sánh thì pastcontinuous - quá khứ tiếp diễn (I was doing) và pastsimple - quá khứ đơn (I
did):
Past continuous (đang ở giữa hành động)
I was walking ... enjoyed Did you enjoy? I didn’t enjoy
Pastcontinuous
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...
... Pastsimple (Thì quá khứ đơn)
Simple Past là thì quá khứ đơn.
Để viết câu ở thì SimplePast 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 SimplePast 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...
... 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...
... waiting.
We’ve been waiting for an hour.
Present perfectcontinuousandsimple
Unit 10. Present perfectcontinuousandsimple
A Nghiên cứu ví dụ sau:
Ann’s clothes are covered in ... quấy rầy tôi bây giờ. Tôi đang làm việc.
Present perfectcontinuous & Present perfect
continuous andsimple
Unit 9. Present perfectcontinuous
A It has been raining. Xem ví dụ sau: ... 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...
... 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...