人教新目標 (Go for it) 版九年級全冊Section A評優(yōu)課課件ppt-課件下載-教習網(wǎng)

Unit12 Kife is full of the unexpectedPeriod 3 Section A Grammar focus-4c
人教新目標版英語九年級
Presentation
1.學習本課新詞匯:cream，workday，show up, bean, market, by the end of2. 掌握句型：By the time I arrived at the party, everyone else had already shown up.When she arrived at the movie theater, she remembered she had forgotten to feed her dog. 3. 通過翻譯Grammar focus 中的句子，完成句子，探究過去完成時的概念，用法和結構。4.通過控制性練習(4a)和自由練習(4b，4c)，能正確使用過去完成時。
Learning aims
Presentation
Pre-grammar
Look and say.
cream n. 奶油；乳脂
workday n. 工作日
show up 趕到；露面
bean n. 豆；豆莢
market n. 市場；集市
by the end of 在(某時間點)以前
New words
Presentation
Pre-grammar
Look and say.
What happened to her?
When she got to school, she realized that she had left her backpack at home.
By the time she got up, her brother had already gotten in the shower.
By the time she got outside, the bus had already left.
By the time she walked into class, the teacher had started teaching already.
Revision
Presentation
Pre-grammar
Look and say.
Have you ever been late for school?
The bell rang.
She got to school.
present
By the time _______________, the bell _________.
she got to school
had rung
present
The teacher started teaching already.
She got into the classroom.
When she___________________, the teacher __________________already.
got into the classroom
had started teaching
Warming up
Presentation
While-grammar
Read and translate.
Read the sentences and translate them.
Presentation
Pre-grammar
Look and fill.
Fill in the blanks according to grammar focus.
1)當我到達學校的時候，我才意識到我把書包忘在家里了。 ______I got to school, I realized that I ____ ______ my backpack at home. 2)到我返回學校的時候，鈴聲已經(jīng)響過了。 ____ ___ ____ I got back to school, the bell ______ _______.3)我到達公共汽車站之前，汽車已經(jīng)離開了。 Before I _____ _____ the bus stop, the bus ______ _______ _______.4)我決定先買一杯咖啡，然后再去辦公室。 I ______ ______ ___ go up to my office when I decided to get a coffee first.5)就在我和別的工作人員一起排隊等候的時候，聽到了一個巨大的聲響。As I ____ ____ ____ ____ with the other office workers, I ____ ___ ___ ____.
When
had
left
By the time
had rung
got to
had already left
was about to
was waiting in line
heard a loud sound
Practice
Presentation
Pre-grammar
What did you find out?
探究語法規(guī)律
探究一：過去完成時的結構和用法
過去完成時表示過去某一時間或動作以前已經(jīng)發(fā)生或完成了的動作。它表示動作發(fā)生的時間是“過去的過去”。
過去完成時的構成：_____+___________
had
過去分詞
過去完成時常與________________________等引導的時間狀語連用。
when, before, by the time
Presentation
Pre-grammar
探究語法規(guī)律
探究一：過去完成時的結構和用法
圖解語法
now
The bell rang.
8:00 AM
8:15 AM
By the time _______________, the bell _________.
had rung
Mary got to school.
參照點
過去完成時以一個過去的時間點為參照，表示該動作發(fā)生在“過去的過去”。
Mary got to school.
Presentation
Pre-grammar
探究語法規(guī)律
探究一：過去完成時的結構和用法
圖解語法
now
The teacher started teaching in the classroom.
8:20 AM
8:22 AM
When ______________________, ______________________________________.
the teacher had started teaching in the classroom
She got into the classroom.
過去完成時以一個過去的時間點為參照，表示該動作發(fā)生在“過去的過去”。
參照點
Presentation
Pre-grammar
探究語法規(guī)律
now
The bus left.
5:20 PM
5:21 AM
Before ___________________________, _____________________.
the bus had already left
She arrived at the bus stop.
過去完成時以一個過去的時間點為參照，表示該動作發(fā)生在“過去的過去”。
參照點
探究一：過去完成時的結構和用法
圖解語法
Presentation
Pre-grammar
探究語法規(guī)律
探究一：過去完成時的結構和用法
圖解語法
Make sentences with By the time… or When…
6:30 6:40 now
the policeman get to the shop
Tom run away
By the time\When the policeman got to the shop, Tom had run away.
Presentation
Pre-grammar
探究語法規(guī)律
探究一：過去完成時的結構和用法
圖解語法
Make sentences with By the time… or When…
Liu Mei wake up
the concert be over
By the time\When Liu Mei woke up, the concert had been over.
Presentation
Pre-grammar
探究語法規(guī)律
探究一：過去完成時的結構和用法
◆ When I got to school, I realized that I had left my backpack at home.◆ By the time I got back to school, the bell had rung.◆ Before I got to the bus stop, the bus had already left.
由when, by the time, before等引導時間狀語從句時，若描述發(fā)生在過去的事，主句常用過去完成時(had + 過去分詞)表示動作發(fā)生在過去的過去。
參照物---時間狀語從句
Presentation
Pre-grammar
探究語法規(guī)律
探究一：過去完成時的結構和用法
by 的用法
by +時間點
“到……為止；截止……時”
by+現(xiàn)在時間，句子時態(tài)用現(xiàn)在完成時
By now, I have finished all my homework. 截止現(xiàn)在，我已經(jīng)完成了所有的作業(yè)。
by+過去時間，句子時態(tài)用過去完成時
By nine o’clock last night, we had got 200 pictures from the spaceship. 到昨晚9點鐘，我們已經(jīng)收到200 張飛船發(fā)來的圖片。
by+將來時間，句子時態(tài)用將來完成時
By next Friday, We will have finished Unit 5. 到下周五結束時，我們將要學完第五單元。
Presentation
Pre-grammar
探究語法規(guī)律
探究一：過去完成時的結構和用法
by the time 的用法
by the time 意為“到……時候(為止)”, 是一個介詞短語, 在句中常起到連詞的作用, 引導時間狀語從句。1.如果從句中的謂語動詞是一般過去時, 那么主句的謂語動詞通常用過去完成時, 表示“截止到從句動作發(fā)生時, 主句動作已經(jīng)完成, 即過去的過去”。
例：By the time you came back, I had finished this book. 你回來時我已經(jīng)把這本書看完了。（從句謂語動詞came back 為一般過去時, 所以主句動作用過去完成時had finished, 表示過去的過去。）
2. 如果從句中的謂語動詞為一般現(xiàn)在時或現(xiàn)在完成時, 那么主句中的謂語動詞常用將來完成時, 表示“截止到將來的某一時刻為止, 主句動作將已完成”。
例：By the time I get home, they will have left. 我到家時他們將已經(jīng)離開。By the time I graduate next year, I will have lived here for five years. 到明年畢業(yè)時, 我將已經(jīng)在這待了五年了。
Presentation
Pre-grammar
探究語法規(guī)律
探究一：過去完成時的結構和用法
by the end of +時間點意為“到……結束時”by the end of +過去的時間點，主句用過去完成時；例：By the end of last year, I had stayed in Xi’an for seven years. 到去年結束時，我已經(jīng)在西安待了7年了。By the end of last week, they had completed the bridge.
by the end of…的用法
by the end of +將來的時間點，主句用將來完成時；
By the end of next month, I will have finished my new book. 到下個月結束時我將要完成我的新書。
Presentation
Pre-grammar
探究語法規(guī)律
探究一：過去完成時的結構和用法
過去完成時還可表示過去某一時刻之前發(fā)生的動作或狀態(tài)持續(xù)到過去某個時間或持續(xù)下去，常與for, since等詞連用。例: When Jack arrived, Mary had been away for almost an hour. 當杰克到時，瑪麗已經(jīng)離開快一個小時了。
My grandmother had been dead since November last year.
用所給詞的適當形式填空。?
1.?When?I?got?there?the?bus?_________?(go).?2.?By?the?time?I?got?to?class,?the?teacher ___________ (start)?teaching.??3.?We?_____________?(learn)?over?1,000?words?by the end?of?last?term.4.?I?___________?(clean)?the?room?before?he arrived?here.?
【實戰(zhàn)演練】
had gone
had started
had learnt
had cleaned
Presentation
Pre-grammar
探究語法規(guī)律
探究二：一般過去時、現(xiàn)在完成時與過去完成時之間區(qū)別
1.一般過去時表示在過去某時發(fā)生的動作或存在的狀態(tài)。
5 years ago

now
2. 現(xiàn)在完成時表示的動作發(fā)生在過去，但側重對現(xiàn)在產(chǎn)生的結果或造成的影響，與現(xiàn)在有關。其結構為：“助動詞 have（has）+過去分詞” 。例：We have learned English for 5 years.
5 years ago
have learned
now
例：We started to learn English 5 years ago. 我們五年前開始學英語。
我們已經(jīng)學了五年的英語了。
Presentation
e.g. We have learned 1,000 English words so far. We had learned 1,000 English words by then.
Pre-grammar
探究語法規(guī)律
探究二：一般過去時、現(xiàn)在完成時與過去完成時之間區(qū)別
3. 過去完成時表示在過去某個時間或動作之前已經(jīng)發(fā)生或完成了的動作或存在的狀態(tài)，即“過去的過去（ past-in-the-past ）”。例：We had learned English for 4 years by last year. 到去年為止，我們已經(jīng)學英語四年了?！　　　　?
by last year
now
began to learn
for 4 years
Presentation
Pre-grammar
探究語法規(guī)律
What did you find out?
探究三：be about to do sth.的用法
1)表示即將發(fā)生的動作，在時間上指最近的將來。如:We are about to start. 我們就要出發(fā)了。The new school year is about to begin.新學年開學在即。2)在含有 be about to do 的句子中，不能再加時間狀語。如:Wrong: The medical team is about to start immediatelyRight: The medical team is about to start.醫(yī)療隊就要出發(fā)了。
Presentation
Post-grammar
Make sentences using by the time or before.
Before I put cream in the coffee, the coffee had become cold.
By the time I got to school, the teacher had collected the math homework.
I had completed the work for my boss before the workday ended.
The movie had started before I arrived at the cinema.
By the time I got home from my language course, my mother had finished making the apple pie.
4a
Practice
Presentation
Post-grammar
Fill in the blanks with the correct forms of the words in the box.
露面
shown up
had
had forgotten
n.豆
n.市場
had
rushed out
had found out
arrived at
had gone into
4b
Presentation
Post-grammar
Write two true statements and one false statement about your day yesterday. Then ask your classmates to guess the false statement.
I had already had breakfast.
I had finished my homework.
had had too much fruit.
動身去
在……以前
4c
Presentation
Post-grammar
一、用所給單詞的適當形式填空
1.他說他以前見過你。
He said that he ______________ (see) you before.
had seen
2. 當我進來時，他已做完了作業(yè)。
When I came in, he ________________(finish) his homework.
had finished
3. The children ran away after they ___________ (break) the window.
4. I went to Tom’s house but he __________ (go) out.
had gone
had broken
5. My friend __________ (buy) the car two years ago. He ________________ (have) it for two years.
bought
has had
Class test
Presentation
Post-grammar
Class test
二、翻譯下列句子。
1. 當他到達學校的時候，老師已經(jīng)開始上課了。 _______________________________________________________2. 當我出來的時候，我爸爸已經(jīng)離開家了。 _________________________________3. 在我拿書包以前我把門鎖上了。 _________________________________4. 在她做完作業(yè)之前我媽媽已經(jīng)回來了。________________________________
By the time he got to school, the teacher had already started teaching.
When I got outside, my father had left home.
Before I got my schoolbag, I had locked the door.
Before she finished her homework, my mother had already been back.
Presentation
1. Review the new words and expressions. 2. Recall the unexpected in your daily life and try to tell them to your friends in English.3. Preview the new words and expressions.
Homework

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