9年级英语人教全一册 Unit 12 Life is full of the unexpected. 教案

2. Tell the story about Mary’s bad day.

(1)  Show pictures about Mary’s bad day, Ss to look through them and guess what happened to the girl?(通过展示主题图，让学生根据图片情景预测故事内容激发学生的好奇心）

(2)Show pictures to tell the story with the past perfect tense.

（通过讲故事引导学生初步感知过去完成时的用法）

(3) Show the target language in the class and ask Ss to read them and find out the similarity among them.

（通过呈现目标语言引导学生找出句子的共同点归纳过去完成时的结构）

3. Learn the structure and usage of past perfect tense.

(1) 构成：由“助动词had (用于各种人称和数) + 过去分词”构成

     否定式：had not + 过去分词   缩写形式：hadn’t

(2) 用法：过去完成时表示在过去某一时间或动作之前已经发生或完成了的动作。

(3) 呈现时间轴    

A

B    past         now           future

（过去的过去）

观察与思考：

By the time I got up, my brother had already gotten in the shower.

  By the time I got outside, the bus had already left.

  When I got to the school, I realized I had left my backpack at home.

① 这些句子是什么时态的句子?_____________ 

  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的动作。即“__________”。

结构为：_________

②by the time 意思是 __________, = when, 后接过去时的句子时, 从句的谓语动词用____________，主句的谓语动词用____________

(4)  过去完成时的判断依据

①  时间状语

by+过去的时间点       Jim had finished his homework by ten last night.

by短语+过去的时间点   We had learned ten units by the end of last term.

before+过去的时间点    Cindy had read 12 books before last week.

②  标志词+含义（过去的过去）

· 与already, just, ever, yet 等连用表示过去的过去。

He told me that his team had already won.

My brother said that he hadn't finished his work yet.

. when/by the time/before+时间状语从句

When she got home, her children had slept.

Before they arrived here,the film had already started.

By the time Tina got into the station, the train had left.

③上下文语境

I met my English teacher last week, I hadn't seen her since I graduated.

        过去完成时

构 成                                 用  法     过去的过去

had +过去分词                        过去完成时表示在过去某一时间或动作

                                     之前已经发生或完成了的动作。

判断依据

1.      时间状语          2.标志词+含义(过去的过去)       3.上下文语境

by/by短语/before         already/just/ever/yet...

+过去的时间点           when/by the time/before+从句            

让学生归纳并通过思维导图的方式呈现过去完成时的结构、用法及判断依据。