人教版九年级全册 Unit 12 Life is full of the unexpected Grammar课件(共17张PPT）

(共17张PPT)
Unit 12
Grammar
九年级英语人教版
授课人：***
on a bad morning
What happened to you on a bad morning
First, I had overslept when the clock went off.
Then by the time I ate breakfast, I had hurt my hand with a knife.
Before I went to school, I had gone to the doctor.
And you
I had forgotten to have breakfast before I went to the office this morning.
I had forgotten to have breakfast before I went to the office this morning.今天早晨去办公室之前，我忘记吃早饭了。
【分析】
“去办公室”是发生在过去的事情，而“忘记吃早饭”发生在“去办公室”之前，所以是“过去的过去”，要用过去完成时。
1. 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”。
2. 表示发生在过去的动作对过去的某一时间点造成的某种影响或结果，用来指定在另一个过去行动之前就已经完成了的一个事件。
过去完成时
【定义】
Fill in the blanks.
1. 过去完成时的构成：_____+___________
2. 过去完成时表示：
__________________________________
__________________________________
3. 过去完成时常与______________________等引导的时间状语连用。
had
过去分词
when, before, by the time
过去某一时刻或动作之前已经发生或完成的动作。
Read and translate
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 got to school, I realized that I
______ ______ my backpack at home.
2)到我返回学校的时候，铃声已经响过了。
_____ _____ _____ I got back to school, the bell ______ _______.
When
had
left
By the time
had rung
根据汉语提示完成句子。
3)我到达公共汽车站之前， 汽车已经离开了。
Before I _____ _____ the bus stop, the
bus ______ _______ _______.
4)我决定先买一杯咖啡，然后再去办公室。
I ______ ______ ______ go up to my office when I decided to get a coffee first.
got to
had
already left
was about to
5)就在我和别的工作人员一起排队等候的时候，我听到了一个巨大的声响。
As I ______ _______ ______ ______ with the other office workers, I
______ _____ _____ ______.
was waiting in line
heard a loud sound
◆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。
【观察】
【结论】
I was about to go up to my office when I decided to get a coffee first.
As I was waiting in line with the other office workers, I heard a loud sound.
【观察】
be about to do, be doing等表示即将或正在做某事时，常用when, as引导从句表示突然发生的动作。
【结论】
1. 定义 2. 构成
3. 用法 4. 标志
be about to do sth.
翻译下列句子。
1. 当她到达学校的时候，老师已经离开了。
_________________________________
_________________________________
2. 当我出来的时候，我爸爸已经离开家上班了。
_________________________________________
3. 在我要走的时候，我听到一声巨响。
_______________________________________
By the time she got to school, the teacher had already left.
When I got outside, my father had left home for work.
As I was about to leave, I heard a loud sound.
写出含有过去完成时的5个句子；
用 be about to do sth. 造句（3个）。
本课结束