4a—4d优秀教案说课稿

Grammar unless, as soon as & so ... that ...

连词是一种虚词，不能充担一个句子成分，但可以起连接的作用。unless, as soon as和so ... that ... 都是连词，均可用来引导从句。

◆unless意为“除非；如果不”，相当于if ... not ...，用来引导条件状语从句。如：

I won’t go fishing unless it is fine tomorrow.

= I won’t go fishing if it isn’t fine tomorrow. ◆as soon as意为“一……就……”，用来引导时间状语从句。如：

I will tell you as soon as Mark arrives here. 提示：

1. 通常情况下，在含有unless和as soon as的复合句中，如果主句用一般将来时或主句的谓语部分含有情态动词，那么unless和as soon as引导的从句常用一般现在时。

2. unless和as soon as引导的从句既可放在主句之前，也可放在主句之后，从句位于主句之前时，常用逗号将其与主句隔开。

◆so ... that ... 意为“如此……以至于……”，用来引导结果状语从句。其中，so修饰形容词或副词，常见的结构有：“so+形容词 / 副词+that从句”和“so+形容词+a / an +可数名词的单数形式+that从句”。如：

I’m so interested in the job that I will try to get it.

He is so kind a boy that we all like him. 【链接】

so ... that ... 结构可与too ... to ...结构， ... enough to ... 结构进行转换，但是如果that引导的从句中的主语和主句中的主语不同，转化为too ... to ... 结构或 ... enough to ... 结构时要用for引出逻辑主语。如：

1. He spoke so fast that we could hardly follow him. →He spoke too fast for us to follow.

2. The boy is so tall that he can get the pears on the tree. →The boy is tall enough to get the pears on the tree. 【运用】

Ⅰ. 单项选择

1. Denny, please give me a call _______ you arrive so that I won’t worry.

A. unless

B. until

C. as soon as

D. although 2. You can’t drive _______ you give up drinking. A. unless Ⅱ. 汉译英

1. 一放学我就去你家。

___________________________________________ 2. 除非你邀请我，否则我将不去参加聚会。

___________________________________________ Ⅲ. 同义句转换

1. He is too old to get this job. ___________________________________________ 2. Don’t leave here unless your mother calls me.

___________________________________________ 答案

Ⅰ. 1-2 CA Ⅱ. 1. I will go to your home as soon as the school finishes. 2. I won’t go to the party unless you invite me.

Ⅲ. 1. He is so old that he can’t get this job / He is not young enough to get this job.

2. Don’t leave here if your mother doesn’t call me.

B. when

C. as soon as

D. if