人教版八年級英語下冊《An old man tried to move the mountains》SectionA PPT教學課件(第3課時)，共40頁。
Objective
To learn the usage of unless, as soon as and so … that.
To learn the Grammar Focus.
To learn new words: fit, couple, smile, marry…
Free talk
Try to make a conversation about the story Yu Gong Moves a Mountain with your partner.
How does the story Yu Gong Moves a Mountain begin?
Once upon a time, there was a very old man … the mountains were so high and big that it took a long time to walk to the other side… The old man decided to move the mountains…
What happened next?
One day, a man told Yu Gong that he could never do it because he was old and weak. As soon as the man finished talking, Yu Gong said that his family could continue to…
Where would they put all the earth and stone from the mountains?
Yu Gong said they could put them into the sea because it’s big enough to hold everything.
Grammar Focus
How does the story begin?
Once upon a time, there was a very old man ...
What happened next?
As soon as the man finished talking, Yu Gong said that his family would continue to move the mountains after he died.
Why was Yu Gong trying to move the mountains?
Because they were so big that it took a long time to walk to the other side.
Who is the Monkey King?
He is the main character in Journey to the West.
What can’t the Monkey King do?
He cannot turn himself into a man unless he can hide his tail.
unless 的用法
conditional clauses with if and unless
含有if的復合句由兩個分句組成；if 為連詞，引導條件狀語從句，另一句為主句。
如果談論的是某一個動作發(fā)生后勢必會產生某個結果，那么主從句都用一般現(xiàn)在時態(tài)。
as soon as 的用法
英語動詞的時間大致可分為三段：過去時、現(xiàn)在時、將來時。假設有兩件事A和B，就會出現(xiàn)三種情況：
A 過去時 as soon as B 過去時
A 現(xiàn)在時 as soon as B 現(xiàn)在時
A 將來時 as soon as B 將來時
在每一個大的時間段內，A 和 B 的時態(tài)要統(tǒng)一。比如 A 過去時，B 肯定在過去時內。其它也是如此。至于在每個大時間段內，再根據(jù)A 和 B兩件事的具體情況，具體對待。比如：A 和B都是過去時，A 和 B 是同時發(fā)生，還是先后發(fā)生，不是即將發(fā)生，再分別選用完成時、進行時、將來時。例如：
A 過去時 B 過去時：
I arranged the flowers in the vase as soon as I came back home.
一回到家里，我就把花在花瓶里插好。
A 過去進行時 B 過去完成時(虛擬)
He was shaking with fright as if he had seen a ghost.
他嚇得直哆嗦，就好像看見了鬼一樣。
A 將來時 B 將來時(可用一般現(xiàn)在時表達)
They will post me the tickets/post the tickets to me as soon as they receive my cheque.
他們收到我的支票后就立刻把票寄給我。
as soon as連接的時間狀語從句中，指未發(fā)生的動作。規(guī)律是：主句一般將來時，從句用一般現(xiàn)在時代替一般將來時。 如：
I will tell him the news as soon as he comes back.
緊接著發(fā)生的兩個短動作，主從句都用一般過去時。
如：He took out his English books as soon as he sat down.
so…that… 的用法
so .... that.... 如此……以致于……
(that 引導的結果狀語從句)
so的后面跟副詞或形容詞，例：
老師說的太快了，以至于我聽不清楚他的話。
The teacher speaks so fast that I can’t catch the words.
［比較］so…that…與so that
So that:
（1）引導結果狀語從句，意為“因此，所以”，主句和從句間常用逗號分開，一般不與情態(tài)動詞連用。
Nothing more was heard of him, so that people thought that he was dead.
未再聽到他的消息，以致人們認為他已死去了。
（2）引導目的狀語從句，意為“為了，以便”，通常從句中用may，might，can，could等情態(tài)動詞。
We left early so that we could catch the first bus.
我們很早出發(fā)，以便能趕上第一班汽車。
Homework
Use “unless”, “as soon as” and “so…that” to make as many sentences as possible.
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