巧用连接词

有的学生在作文中使用过多简单句，成了简单句堆砌；有的写复杂句时，动辄用so， and，then，but，or，however，yet等非但达不到丰富表达方式的目的，反而使句子结构松散、呆板。为了避免这种现象，可以通过使用连接词，尤其是一些表示从属关系的连接词，如 who，which，that，because，since，although，after，as，before，when，whenever，if，unless，as if等，不仅能够丰富句型，而且还能够把思想表达得更清楚，意义更连贯。例如： Natural resources are very limited. They will be exhausted in the near future. It is not true. But it becomes a major concern around the world. This is a widely accepted fact.

这段文字用简单句表达，它们之间内在的逻辑关系含糊不清，意思支离破碎。如果使用连接词，将单句与其前后合并，形成主次关系，就把一个比较复杂的内容和关系表达得层次清楚、结构严谨。例如： It is a widely accepted fact that there is a major concern around the world for the exhaustion of limited natural resources in the near future，though it is unlikely to be true. 再如：

The Mississippi River is one of the longest rivers in the world，and in spring time it often overflows its banks，and the lives of many people are endangered.

此句用and把三个分句一贯到底，既乏味又可笑。如果使用了关系代词which，语义就会更连贯，语言也会更流畅：
The Mississippi River，which is one of the longest rivers in the world，often overflows its banks in the spring time，endangering the lives of many people.