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An old man tried to move the mountain.

重难点分析

       unless 的用法

unless是连词,引导条件状语从句,意为除非。含有否定意义,相当于if引导的条件状语从句的否定形式,一般情况下 unless=if…not

eg:You will fail the exam unless you prepare for it

=You will fail the exam if you don’t prepare for it.

He won’t know the word’s meaning unless he looks it up in the dictionary.

=If he doesn’t look up the word in the dictionary, he won’t know its meaning.

注意:unless 引导的条件状语从句和if引导的条件状语从句一样,用一般现在时代替一般将来时。

: Don't come in unless you will be invited to.

: Don't come in unless you're invited to.

: Unless he will come, we won't be able to go.

: Unless he comes, we won't be able to go.

as soon as 的用法

as soon as 是连词,引导时间状语从句,意为一。。。.就。。。。

适用于多种时态。

1. 主句是一般将来时,从句要用一般现在时表示将来的意义。

I will tell him the news as soon as he comes back。(动作未发生)

2. 主句过去时,从句过去时

As soon as I came in, Jack cried. (动作发生在)

so…that… 的用法

so .... that.... 如此....以致于.... (that 引导的结果状语从句)

so+形容词/副词+that

such+a/an+形容词+可数名词单数+that

such+形容词+可数名词复数/不可数名词+that区别

so+形容词+a/an+可数名词单数+that

so的后面跟副词或形容,such后接名词,名词前可有形容词修饰

例句:老师说的太快了,以至于我听不清楚他的话。

The teacher speaks so fast that I can't catch the words.

但名词前有数量的manymuchfew修饰时,用so不用such

Egwe have so much time that we can finish the work very well.

Fill in the blanks with unless, as soon as or so ... that.

1. ___________ her father died, the stepsisters made her do all the chores.

2. She was____      busy_____ she had no time to make a dress for the party.

3. The mice knew that ___________ they helped her make a dress, she would not be able to go to the party.

4. ___________ the prince saw her, he fell in love with her.

5. The prince knew that _________ the girl’s foot could fit the shoe, it was not the right girl.

6. The new couple were ____ happy ______ they couldn’t stop smiling when they got married.

答案:

1.As soon as 2.so…that 3.unless 4.As soon as 5.unless 6.so that

    
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