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初中英语人教新目标 (Go for it) 版九年级全册Section A评优课ppt课件
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这是一份初中英语人教新目标 (Go for it) 版九年级全册Section A评优课ppt课件，文件包含人教版新目标英语九年级Unit12SectionAGrammarfocus-4c课件pptx、人教版新目标英语九年级Unit12SectionAGrammarfocus-4c精讲精练doc等2份课件配套教学资源，其中PPT共28页， 欢迎下载使用。
1.学习本课新词汇:cream，wrkday，shw up, bean, market, by the end f2. 掌握句型：By the time I arrived at the party, everyne else had already shwn up.When she arrived at the mvie theater, she remembered she had frgtten t feed her dg. 3. 通过翻译Grammar fcus 中的句子，完成句子，探究过去完成时的概念，用法和结构。4.通过控制性练习(4a)和自由练习(4b，4c)，能正确使用过去完成时。
cream n. 奶油；乳脂
wrkday n. 工作日
shw up 赶到；露面
bean n. 豆；豆荚
market n. 市场；集市
by the end f 在(某时间点)以前
What happened t her?
When she gt t schl, she realized that she had left her backpack at hme.
By the time she gt up, her brther had already gtten in the shwer.
By the time she gt utside, the bus had already left.
By the time she walked int class, the teacher had started teaching already.
Have yu ever been late fr schl?
The bell rang.
She gt t schl.
By the time _______________, the bell _________.
she gt t schl
The teacher started teaching already.
She gt int the classrm.
When she___________________, the teacher __________________already.
gt int the classrm
had started teaching
Read the sentences and translate them.
Fill in the blanks accrding t grammar fcus.
1)当我到达学校的时候，我才意识到我把书包忘在家里了。 ______I gt t schl, I realized that I ____ ______ my backpack at hme. 2)到我返回学校的时候，铃声已经响过了。 ____ ___ ____ I gt back t schl, the bell ______ _______.3)我到达公共汽车站之前， 汽车已经离开了。 Befre I _____ _____ the bus stp, the bus ______ _______ _______.4)我决定先买一杯咖啡，然后再去办公室。 I ______ ______ ___ g up t my ffice when I decided t get a cffee first.5)就在我和别的工作人员一起排队等候的时候，听到了一个巨大的声响。As I ____ ____ ____ ____ with the ther ffice wrkers, I ____ ___ ___ ____.
By the time
had rung
had already left
was abut t
was waiting in line
heard a lud sund
What did yu find ut?
探究一：过去完成时的结构和用法
过去完成时表示过去某一时间或动作以前已经发生或完成了的动作。它表示动作发生的时间是“过去的过去”。
过去完成时的构成：_____+___________
过去完成时常与________________________等引导的时间状语连用。
when, befre, by the time
Mary gt t schl.
过去完成时以一个过去的时间点为参照，表示该动作发生在“过去的过去”。
The teacher started teaching in the classrm.
When ______________________, ______________________________________.
the teacher had started teaching in the classrm
The bus left.
Befre ___________________________, _____________________.
the bus had already left
She arrived at the bus stp.
Make sentences with By the time… r When…
6:30 6:40 nw
the pliceman get t the shp
Tm run away
By the time\When the pliceman gt t the shp, Tm had run away.
Liu Mei wake up
the cncert be ver
By the time\When Liu Mei wke up, the cncert had been ver.
◆ When I gt t schl, I realized that I had left my backpack at hme.◆ By the time I gt back t schl, the bell had rung.◆ Befre I gt t the bus stp, the bus had already left.
由when, by the time, befre等引导时间状语从句时，若描述发生在过去的事，主句常用过去完成时(had + 过去分词)表示动作发生在过去的过去。
参照物---时间状语从句
“到……为止；截止……时”
by+现在时间，句子时态用现在完成时
By nw, I have finished all my hmewrk. 截止现在，我已经完成了所有的作业。
by+过去时间，句子时态用过去完成时
By nine ’clck last night, we had gt 200 pictures frm the spaceship. 到昨晚9点钟，我们已经收到200 张飞船发来的图片。
by+将来时间，句子时态用将来完成时
By next Friday, We will have finished Unit 5. 到下周五结束时，我们将要学完第五单元。
by the time 的用法
by the time 意为“到……时候(为止)”, 是一个介词短语, 在句中常起到连词的作用, 引导时间状语从句。1.如果从句中的谓语动词是一般过去时, 那么主句的谓语动词通常用过去完成时, 表示“截止到从句动作发生时, 主句动作已经完成, 即过去的过去”。
例：By the time yu came back, I had finished this bk. 你回来时我已经把这本书看完了。 （从句谓语动词came back 为一般过去时, 所以主句动作用过去完成时had finished, 表示过去的过去。）
2. 如果从句中的谓语动词为一般现在时或现在完成时, 那么主句中的谓语动词常用将来完成时, 表示“截止到将来的某一时刻为止, 主句动作将已完成”。
例：By the time I get hme, they will have left. 我到家时他们将已经离开。By the time I graduate next year, I will have lived here fr five years. 到明年毕业时, 我将已经在这待了五年了。
by the end f +时间点意为“到……结束时”by the end f +过去的时间点，主句用过去完成时；例：By the end f last year, I had stayed in Xi’an fr seven years. 到去年结束时，我已经在西安待了7年了。By the end f last week, they had cmpleted the bridge.
by the end f…的用法
by the end f +将来的时间点，主句用将来完成时；
By the end f next mnth, I will have finished my new bk. 到下个月结束时我将要完成我的新书。
过去完成时还可表示过去某一时刻之前发生的动作或状态持续到过去某个时间或持续下去，常与fr, since等词连用。例: When Jack arrived, Mary had been away fr almst an hur. 当杰克到时，玛丽已经离开快一个小时了。
My grandmther had been dead since Nvember last year.
用所给词的适当形式填空。
1. When I gt there the bus _________ (g). 2. By the time I gt t class, the teacher ___________ (start) teaching. 3. We _____________ (learn) ver 1,000 wrds by the end f last term.4. I ___________ (clean) the rm befre he arrived here.
had started
had cleaned
探究二：一般过去时、现在完成时与过去完成时之间区别
1.一般过去时表示在过去某时发生的动作或存在的状态。
2. 现在完成时表示的动作发生在过去，但侧重对现在产生的结果或造成的影响，与现在有关。其结构为：“助动词 have（has）+过去分词” 。例：We have learned English fr 5 years.
have learned
例：We started t learn English 5 years ag. 我们五年前开始学英语。
我们已经学了五年的英语了。
e.g. We have learned 1,000 English wrds s far. We had learned 1,000 English wrds by then.
3. 过去完成时表示在过去某个时间或动作之前已经发生或完成了的动作或存在的状态，即“过去的过去（ past-in-the-past ）”。 例：We had learned English fr 4 years by last year. 到去年为止，我们已经学英语四年了。
by last year
began t learn
探究三：be abut t d sth.的用法
1)表示即将发生的动作，在时间上指最近的将来。如:We are abut t start. 我们就要出发了。The new schl year is abut t begin.新学年开学在即。2)在含有 be abut t d 的句子中，不能再加时间状语。如:Wrng: The medical team is abut t start immediatelyRight: The medical team is abut t start.医疗队就要出发了。
Make sentences using by the time r befre.
Befre I put cream in the cffee, the cffee had becme cld.
By the time I gt t schl, the teacher had cllected the math hmewrk.
I had cmpleted the wrk fr my bss befre the wrkday ended.
The mvie had started befre I arrived at the cinema.
By the time I gt hme frm my language curse, my mther had finished making the apple pie.
Fill in the blanks with the crrect frms f the wrds in the bx.
had frgtten
had fund ut
had gne int
Write tw true statements and ne false statement abut yur day yesterday. Then ask yur classmates t guess the false statement.
I had already had breakfast.
I had finished my hmewrk.
had had t much fruit.
一、用所给单词的适当形式填空
1.他说他以前见过你。
He said that he ______________ (see) yu befre.
2. 当我进来时，他已做完了作业。
When I came in, he ________________(finish) his hmewrk.
had finished
3. The children ran away after they ___________ (break) the windw.
4. I went t Tm’s huse but he __________ (g) ut.
5. My friend __________ (buy) the car tw years ag. He ________________ (have) it fr tw years.
1. 当他到达学校的时候，老师已经开始 上课了。 _______________________________________________________2. 当我出来的时候，我爸爸已经离开家了。 _________________________________3. 在我拿书包以前我把门锁上了。 _________________________________4. 在她做完作业之前我妈妈已经回来了。________________________________
By the time he gt t schl, the teacher had already started teaching.
When I gt utside, my father had left hme.
Befre I gt my schlbag, I had lcked the dr.
Befre she finished her hmewrk, my mther had already been back.
1. Review the new wrds and expressins. 2. Recall the unexpected in yur daily life and try t tell them t yur friends in English.3. Preview the new wrds and expressins.
1.学习本课新词汇:cream，wrkday，shw up, bean, market, by the end f2. 掌握句型：By the time I arrived at the party, everyne else had already shwn up.When she arrived at the mvie theater, she remembered she had frgtten t feed her dg. 3. 通过翻译Grammar fcus 中的句子，完成句子，探究过去完成时的概念，用法和结构。4.通过控制性练习(4a)和自由练习(4b，4c)，能正确使用过去完成时。
cream n. 奶油；乳脂
wrkday n. 工作日
shw up 赶到；露面
bean n. 豆；豆荚
market n. 市场；集市
by the end f 在(某时间点)以前
What happened t her?
When she gt t schl, she realized that she had left her backpack at hme.
By the time she gt up, her brther had already gtten in the shwer.
By the time she gt utside, the bus had already left.
By the time she walked int class, the teacher had started teaching already.
Have yu ever been late fr schl?
The bell rang.
She gt t schl.
By the time _______________, the bell _________.
she gt t schl
The teacher started teaching already.
She gt int the classrm.
When she___________________, the teacher __________________already.
gt int the classrm
had started teaching
Read the sentences and translate them.
Fill in the blanks accrding t grammar fcus.
1)当我到达学校的时候，我才意识到我把书包忘在家里了。 ______I gt t schl, I realized that I ____ ______ my backpack at hme. 2)到我返回学校的时候，铃声已经响过了。 ____ ___ ____ I gt back t schl, the bell ______ _______.3)我到达公共汽车站之前， 汽车已经离开了。 Befre I _____ _____ the bus stp, the bus ______ _______ _______.4)我决定先买一杯咖啡，然后再去办公室。 I ______ ______ ___ g up t my ffice when I decided t get a cffee first.5)就在我和别的工作人员一起排队等候的时候，听到了一个巨大的声响。As I ____ ____ ____ ____ with the ther ffice wrkers, I ____ ___ ___ ____.
By the time
had rung
had already left
was abut t
was waiting in line
heard a lud sund
What did yu find ut?
探究一：过去完成时的结构和用法
过去完成时表示过去某一时间或动作以前已经发生或完成了的动作。它表示动作发生的时间是“过去的过去”。
过去完成时的构成：_____+___________
过去完成时常与________________________等引导的时间状语连用。
when, befre, by the time
Mary gt t schl.
过去完成时以一个过去的时间点为参照，表示该动作发生在“过去的过去”。
The teacher started teaching in the classrm.
When ______________________, ______________________________________.
the teacher had started teaching in the classrm
The bus left.
Befre ___________________________, _____________________.
the bus had already left
She arrived at the bus stp.
Make sentences with By the time… r When…
6:30 6:40 nw
the pliceman get t the shp
Tm run away
By the time\When the pliceman gt t the shp, Tm had run away.
Liu Mei wake up
the cncert be ver
By the time\When Liu Mei wke up, the cncert had been ver.
◆ When I gt t schl, I realized that I had left my backpack at hme.◆ By the time I gt back t schl, the bell had rung.◆ Befre I gt t the bus stp, the bus had already left.
由when, by the time, befre等引导时间状语从句时，若描述发生在过去的事，主句常用过去完成时(had + 过去分词)表示动作发生在过去的过去。
参照物---时间状语从句
“到……为止；截止……时”
by+现在时间，句子时态用现在完成时
By nw, I have finished all my hmewrk. 截止现在，我已经完成了所有的作业。
by+过去时间，句子时态用过去完成时
By nine ’clck last night, we had gt 200 pictures frm the spaceship. 到昨晚9点钟，我们已经收到200 张飞船发来的图片。
by+将来时间，句子时态用将来完成时
By next Friday, We will have finished Unit 5. 到下周五结束时，我们将要学完第五单元。
by the time 的用法
by the time 意为“到……时候(为止)”, 是一个介词短语, 在句中常起到连词的作用, 引导时间状语从句。1.如果从句中的谓语动词是一般过去时, 那么主句的谓语动词通常用过去完成时, 表示“截止到从句动作发生时, 主句动作已经完成, 即过去的过去”。
例：By the time yu came back, I had finished this bk. 你回来时我已经把这本书看完了。 （从句谓语动词came back 为一般过去时, 所以主句动作用过去完成时had finished, 表示过去的过去。）
2. 如果从句中的谓语动词为一般现在时或现在完成时, 那么主句中的谓语动词常用将来完成时, 表示“截止到将来的某一时刻为止, 主句动作将已完成”。
例：By the time I get hme, they will have left. 我到家时他们将已经离开。By the time I graduate next year, I will have lived here fr five years. 到明年毕业时, 我将已经在这待了五年了。
by the end f +时间点意为“到……结束时”by the end f +过去的时间点，主句用过去完成时；例：By the end f last year, I had stayed in Xi’an fr seven years. 到去年结束时，我已经在西安待了7年了。By the end f last week, they had cmpleted the bridge.
by the end f…的用法
by the end f +将来的时间点，主句用将来完成时；
By the end f next mnth, I will have finished my new bk. 到下个月结束时我将要完成我的新书。
过去完成时还可表示过去某一时刻之前发生的动作或状态持续到过去某个时间或持续下去，常与fr, since等词连用。例: When Jack arrived, Mary had been away fr almst an hur. 当杰克到时，玛丽已经离开快一个小时了。
My grandmther had been dead since Nvember last year.
用所给词的适当形式填空。
1. When I gt there the bus _________ (g). 2. By the time I gt t class, the teacher ___________ (start) teaching. 3. We _____________ (learn) ver 1,000 wrds by the end f last term.4. I ___________ (clean) the rm befre he arrived here.
had started
had cleaned
探究二：一般过去时、现在完成时与过去完成时之间区别
1.一般过去时表示在过去某时发生的动作或存在的状态。
2. 现在完成时表示的动作发生在过去，但侧重对现在产生的结果或造成的影响，与现在有关。其结构为：“助动词 have（has）+过去分词” 。例：We have learned English fr 5 years.
have learned
例：We started t learn English 5 years ag. 我们五年前开始学英语。
我们已经学了五年的英语了。
e.g. We have learned 1,000 English wrds s far. We had learned 1,000 English wrds by then.
3. 过去完成时表示在过去某个时间或动作之前已经发生或完成了的动作或存在的状态，即“过去的过去（ past-in-the-past ）”。 例：We had learned English fr 4 years by last year. 到去年为止，我们已经学英语四年了。
by last year
began t learn
探究三：be abut t d sth.的用法
1)表示即将发生的动作，在时间上指最近的将来。如:We are abut t start. 我们就要出发了。The new schl year is abut t begin.新学年开学在即。2)在含有 be abut t d 的句子中，不能再加时间状语。如:Wrng: The medical team is abut t start immediatelyRight: The medical team is abut t start.医疗队就要出发了。
Make sentences using by the time r befre.
Befre I put cream in the cffee, the cffee had becme cld.
By the time I gt t schl, the teacher had cllected the math hmewrk.
I had cmpleted the wrk fr my bss befre the wrkday ended.
The mvie had started befre I arrived at the cinema.
By the time I gt hme frm my language curse, my mther had finished making the apple pie.
Fill in the blanks with the crrect frms f the wrds in the bx.
had frgtten
had fund ut
had gne int
Write tw true statements and ne false statement abut yur day yesterday. Then ask yur classmates t guess the false statement.
I had already had breakfast.
I had finished my hmewrk.
had had t much fruit.
一、用所给单词的适当形式填空
1.他说他以前见过你。
He said that he ______________ (see) yu befre.
2. 当我进来时，他已做完了作业。
When I came in, he ________________(finish) his hmewrk.
had finished
3. The children ran away after they ___________ (break) the windw.
4. I went t Tm’s huse but he __________ (g) ut.
5. My friend __________ (buy) the car tw years ag. He ________________ (have) it fr tw years.
1. 当他到达学校的时候，老师已经开始 上课了。 _______________________________________________________2. 当我出来的时候，我爸爸已经离开家了。 _________________________________3. 在我拿书包以前我把门锁上了。 _________________________________4. 在她做完作业之前我妈妈已经回来了。________________________________
By the time he gt t schl, the teacher had already started teaching.
When I gt utside, my father had left hme.
Befre I gt my schlbag, I had lcked the dr.
Befre she finished her hmewrk, my mther had already been back.
1. Review the new wrds and expressins. 2. Recall the unexpected in yur daily life and try t tell them t yur friends in English.3. Preview the new wrds and expressins.
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