1、SENTENCE EXPLANATIONS1. When we use metals, it is important to know how they react with different substances, for example, water and oxygen. (P44)【分析】本句是一个主从复合句。when引导的是_从句。在主句中，it作形式主语，真正的主语是后面的不定式短语。其中how they react . oxygen是宾语从句，作know的宾语。【句意】当我们使用金属时，要了解他们和不同的物质（例如水和氧气）如何发生反应，这一点很重要。【仿写】当我们与别人交流时
2、，要了解应该如何恰当地使用肢体语言，这一点很重要。_2. Here is a table with the metals that react most at the top, and the metals that react least at the bottom. (P44)【分析】本句是一个主从复合句。主句的主干是Here is a table，这是一个由here置于句首引起的倒装句。with . bottom在句中作后置定语，修饰_。that react most和that react least是定语从句，分别修饰两个metals。 【句意】下面是一张金属反应表，位于顶部的金属反应
3、最剧烈，底部的则最缓慢。【仿写】坐在中间的是语文老师。位于他左边的是我最喜欢的英语老师，右边的是受学生欢迎的数学老师。_3. The reaction of metals with these substances can be put in order. (P44)【分析】本句是一个简单句。句子的主干是：主语（The reaction）+谓语（can be put in order）。of metals with these substances作_语，修饰reaction。put . in order意为“把按顺序排列”。【句意】 （不同的）金属与这些物质的反应程度可以按顺序排列起来。【仿
4、写】 你读完这些书后，请把它们按顺序放好。_Key1.【分析】时间状语 【仿写】When we communicate with others, it is important to know how we should use body language in the right way.2.【分析】table【仿写】In the middle sat the Chinese teacher, with the English teacher that I like most on the left, and the math teacher who is popular with students on the right.3.【分析】定 【仿写】 When you have finished reading these books, please put them in order.
