英语句型分类：五大基本句型(2)

　　英语五种基本句型列式

　　如下：

　　基本句型一：S+V （主+谓）

　　基本句型二：S+V+P （主+系+表）

　　基本句型三：S+V+DO （主+谓+宾）

　　基本句型四：S+V+IO+DO（主+谓+间宾+直宾）

　　基本句型五：S+V+DO+OC （主+谓+宾+宾补）

　　简单句与复合句的互换

　　把一个简单句转换成一个复合句，一般是将一个短语变为一个从句。相反，复合句转换为简单句时要把一个从句变为一个短语。

　　1. The foreigners want to know how they can learn to do Chinese Kongfu well. → The foreigners want to know how to learn to do Chinese Kongfu well.

　　【解析】含宾语从句的复合句变为简单句，可以把宾语从句改为"疑问词+不定式"的结构或者改为"主语+谓语+宾语+宾补"这种结构；简单句变复合句，一般是把宾语扩大为宾语从句，其宾语从句应该用将来时或"情态动词+动词原形"的形式。

　　2. She was so weak that she couldn't take care of her baby. → She was too weak to take care of her baby.

　　3. The ice on the lake was so thin that people couldn't skate on it. → The ice on the lake was not thick enough for people to skate on.

　　【解析】当so...that从句是否定句，其主语与主句主语相同，可用句型too...to do sth.替换；当so...that从句是否定句，其主语与主句主语不相同，可用句型too...for sb. to do sth. 替换；当so...that从句是肯定句，其主语与主句主语相同时，可用...enough to do sth.替换；当so...that从句是肯定句，其主语与主句主语不相同时，可用...enough for sb. to do sth.替换。

　　4. Be brave, or you'll lose your chance. → If you aren't brave, you'll lose your chance.