由两个或两个以上的并列分句构成的句子叫做并列句(compoundmentence)。所谓两个分句的并列,并不是指简单地将它们放在一起,而是要通过连词、标点符号或其它手段把它们有效地连接起来。关于并列句的连接问题,语法书上专门讨论的不多。初学者稍有不慎就会造出下面的错句:Those people have their umbrellas up,therefore,it must be raining.句中的 therefore 是连接副词,不是连词。它要么修饰一个简单句或 A sentence consisting of two or more parallel clauses is called a compoundence sentence. The juxtaposition of two clauses does not mean simply putting them together, but connecting them effectively through conjunctions, punctuation or other means. With regard to the question of the connection of parallel sentences, there is not much discussion in the grammar book. The beginners will make the following misunderstandings as they carelessly: Therefore people have their umbrellas up, therefore, it must be raining. Then in the sentence are connected adverbs, not conjunctions. It either modifies a simple sentence or