高一英语各单元语法课件 IT的用法

(共29张PPT)
.
careful
person.
2005.12.11
Summary
The use of “it” for emphasis
可被强调的部分 除谓语之外的句子各成分。
基本句子结构 It is/was＋被强调部分＋that/who/whom +句子的遗留部分
备注 it既可强调现在的情况，也可强调过去的情况。
We called on Professor Wang in his office this morning.
we
Professor
Wang
Eg:
It was we who/ that called
on Professor Wang at his
office this morning.
It was Professor Wang
whom/ that/ who we called
on at his office this morning.
We called on Professor Wang in his office this morning.
in his office
this morning
It was in his office that we
called on Professor Wang
this morning.
It was this morning that we
called on Professor Wang
in his office.
1. It is on this arable land that the farmers produce food for the whole population of China.
2. It was from the early 1990s that scientists started to develop new techniques to increase agricultural production without harming the environment.
怎样判断强调句 --- 若是强调句，去掉'It be… that’
还应是一个完整的句子。
若不是强调句,去掉 'It is…that'已不是一个完整的句子。
Eg:
It is ten years Miss Green returned to Canada.
A. that　B. when　 C. since　 D. as
Practice
Rewrite these sentences, emphasising the underlined parts.
EXAMPLE: The farmers produce the food for the whole population of China on this arable land.
It is on this arable land that the farmers produce the food for the whole population of China
The children often help their parents do the
farm work.
It is the children who often help their parents do the farm work.
2. In 1993, a tomato was developed that was
very different from any grown before.
It was in 1993 that a tomato was developed that was very different from any grown before.
3. The biggest problem of China farmers is the
shortage of arable land.
It is the shortage of arable land that is the
biggest problem for Chinese farmers.
4.The plants grown in greenhouses are protected
from the wind, rain and insects.
It is the plants grown in the greenhouses that are protected from the wind,, rain and insects.
5.Future agriculture should depend on
high technology as well as traditional
methods.
It is high technology as well as
traditional methods that future
agriculture should depend on
Rewrite the sentences below, emphasising
as many parts as possible.
EXAMPLE:
Jia Sixie wrote a book called Qimin Yaoshu during the
years 533-544.
It was Jia Sixie who wrote a book called Qimin Yaoshu during the years 533-544.
It was a book called Qimin Yaoshu that Jia Sixie wrote during the years 533-544.
It was during the years 533-544 that Jia Sixie
wrote a book called Qimin Yaoshu.
It was Henry who gave George a new tie for his birthday last year.
It was to George that Henry gave a new tie for his birthday last year.
It was a new tie that Henry gave George for his birthday last year.
It was last year that Henry gave George a new tie for his birthday last year.
2 . It was during that period of time that they make
these important discoveries.
It was these important discoveries that they make during that
period of time.
It was they who make there important discoveries during that
period of time.
3. It is in South America that some people still practise
this kind of farming.
It is some people in South America who still practise
this kind of farming.
It is this kind of farming that some people in South
America still practise .
Practice:
1.We didn’t begin our lesson until / till our teacher came in.
It was not until our teacher came in that we began our lesson.
The villagers didn’t realize how serious the pollution was until all the fish in the river died.
__ ___ ___ ____ all the fish in the river died ___ the villagers _______ how serious the pollution was.
It
was
not
until
that
realized
“It”试题解析
1. The Parkers bought a new house but _____ will need a lot of work before they can move in.
A. they B. it
C. one D. which
“It”试题解析
2. Tom’s mother kept telling him that he should work harder, but ____ didn’t help.
A. he B. which
C. she D. it
“It”试题解析
3. The weather turned out to be very good, ___was more than we could expect.
A. what B. which
C. that D. it
4. Do you have enough glasses for each guest to have _________
A. it B. them
C. that D. one
“It”试题解析
5. Why don’t we take a little break
Didn’t we just have __________
A. it B. that
C. one D. this
“It”试题解析
6. -He was nearly drowned once.
-When was _________
-____ was in 1998 when he was in middle school.
A. that; It B. this; This
C. this; It D. that; this
7. It was not until 1920 ______ regular radio broadcasts began.
A. while B .which
C .that D. since
“It”试题解析
7. It was not until 1920 ______ regular radio broadcasts began.
A. while B .which
C .that D. since
Regular radio broadcasts didn’t begin
until 1920.
“It”试题解析
8.Could it be in the restaurant in_____ you had dinner with me yesterday_________ you left behind your keys and wallet
A. that, which B. which, that C.where, that D. that, where
“It”试题解析
It could be in the restaurant in_______
you had dinner with me yesterday
_____ you left behind your keys and
wallet
“It”试题解析
the restaurant (in_______ you had
dinner with me yesterday)
which
in the restaurant
which
It could be in the restaurant in_______ you had dinner with me yesterday_________ you left behind your keys and wallet
高考试题解析
the restaurant (in_______ you had
dinner with me yesterday)
which
in the restaurant
that
8.Could it be in the restaurant in_____ you had dinner with me yesterday_____ you left behind your keys and wallet
A. that, which B. which, that C.where, that D. that, where
“It”试题解析
It was for this reason_____ her uncle moved out of New York and settled down in a small village.
A. which B. why C. that D. how
Thank you for attending!
LU GAO QIANG 2006-12-11