1. 简单句的五种形式：
(1)主语+谓语(不及物动词);
(2)主语+谓语(及物动词)+宾语;
(3)主语+谓语+宾语+补语;
(4)主语+谓语+间接宾语+直接宾语;
(5)主语+系动词+表语。
两类系动词：①be动词; ②一些实义动词用作系动词：feel, taste, smell等;
2. 并列句：一个句子当中包含两个或更多互不相依存的主谓结构，中间用一些连接词连接起来的句子。 并列句不能只用逗号隔开，而要用连接词连接。 连接词：(1)并列关系句型：连接词有and, as well as, either…or…，neither…nor…,not only…but also… eg: Last year I met kate and we became friends. Either my uncle can do it, or my aunt can do it。
(2)转折概念并列句型：转折词有but eg: It has no mouth,but it can talk。(3)对比关系的并列句型： eg: He liked sports,while I would rather collect stamps。
练习：2009年6月阅读 Cerling’s team collected tap water samples from 600 cities and constructed a mop of the regional differences。(简单句) Most hydrogen and oxygen atoms in water are stable , but traces of both elements are also present as heavier isotopes . (并列句) 简单句和并列句是复合句的基础，只有夯实基础，才可能笔下生辉，以上内容你掌握了吗?
