past simple and past perfect worksheet pdf
TChon 15 PRESENT PERFECT AND PAST SIMPLE TENSE.doc
Ngày tải lên :
08/07/2013, 01:27
... 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....
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TCHON PERIOD 8 PRESENT SIMPLE, PAST SIMPLE AND PREPOSITIONS OF TIME.doc
Ngày tải lên :
09/07/2013, 01:26
... 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 ...
………………………………………………………………………………………………
………………………………………………………………………………………………
………………………….……………
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...
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EXESRCISES ON PAST SIMPLE OR PRESENT PERFECT
Ngày tải lên :
15/09/2013, 00:10
...
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...
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Tài liệu Past simple (Thì quá khứ đơn) pdf
Ngày tải lên :
19/01/2014, 17:20
... 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...
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Sustainable Energy Harvesting Technologies Past Present and Future Part 7 pdf
Ngày tải lên :
19/06/2014, 08:20
... 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...
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Sustainable Energy Harvesting Technologies Past Present and Future Part 9 pdf
Ngày tải lên :
19/06/2014, 08:20
... 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...
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Sustainable Energy Harvesting Technologies Past Present and Future Part 14 pdf
Ngày tải lên :
19/06/2014, 08:20
... 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...
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past continuous or past simple
Ngày tải lên :
31/08/2013, 01:10
... 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 ... at
the same time in the past.
Eg. Mark was reading a book and
Tony was watching television.
We use the past continuous to
talk about an action that
started in the past but not
finished at...
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Đề tài " Classical and modular approaches to exponential Diophantine equations I. Fibonacci and Lucas perfect powers " pdf
Ngày tải lên :
06/03/2014, 08:21
... 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...
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Unit 5: Possibility and Probability Perfect Modals pdf
Ngày tải lên :
07/03/2014, 07:20
... 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...
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The Simple Past Tense and The Past Continuous Tense
Ngày tải lên :
30/10/2013, 14:11
... 4. The past continuous tense : ( thì quá khứ tiếp diễn )
_ Formation : ( công thức )
S + was / were +...
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Tài liệu Present perfect and past doc
Ngày tải lên :
19/01/2014, 17:20
... been”)
Vậy thì ai làm nhỉ.
Present perfect and past (2)
Unit 14.
Present perfect and past (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?
Past simple (did)
I did a lot of work yesterday.
Hôm qua tôi đã làm nhiều việc.
Chúng ta dùng thì simple past khi đề cập tới một thời điểm đã kết thúc...
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Unit 13. Present perfect and past (1) doc
Ngày tải lên :
22/06/2014, 21:20
... 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 past simple cho chúng ta biết về quá khứ. Nếu có ai đó nói rằng:
“Tom lost his key” chúng ta không...
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Unit 14. Present perfect and past (2) doc
Ngày tải lên :
22/06/2014, 21:20
... 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 ... Ví dụ như: Today, this week, since 1985.
Past simple (did)
I did a lot of work yesterday.
Hôm qua tôi đã làm nhiều việc.
Chúng ta dùng thì simple past khi đề cập tới một thời điểm đã kết thúc ... ngày nghỉ mùa hè năm rồi.
Thì
present perfect luôn có một sự liên hệ với hiện tại. Xem Unit 7, Unit 8, Unit 9,
Unit 10, Unit 11, Unit 12. Thì past simple chỉ diễn đạt một sự việc đã xảy ra...
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