1、Unit 5 The power of nature Sentence explanations请和你的同学一起认真分析下列句子，并补全所缺内容。这种学习方式能逐步提高你理解长难句的能力。1. Having collected and evaluated the information, I help other scientists to predict where lava from the volcano will flow next and how fast. (P34)【分析】 本句是一个主从复合句。主句主干为：I help other scientists to predict。
2、Having collected and evaluated the information是动词-ing形式短语的完成式作状语。 predict 后接两个分别由where和how引导的宾语从句，how fast后省略了it will flow。2. The lava that flows slowly like a wave down the mountain causes far more damage because it buries everything in its path under the molten rock. (P34)【分析】本句是一个主从复合句。主句的主干为The
3、lava causes far more damage；that引导定语从句修饰先行词_，并在从句中作主语；because在句中引导原因状语从句。far可以修饰比较级，意为“的多”。【仿写】我认为，从实践经验中获得的知识远比书本知识重要。In my opinion, knowledge _ is _ than that from book.3. The other two climbed down into the crater to collect some lava for later study, but this being my first experience, I stayed at the top and watched them. (P35)【分析】本句是一个由but连接的并列句。this being my first experience是一个独立主格结构，相当于一个原因状语从句：as this was my first experience。【仿写】天气允许的话，我们将明天动身。 _, we shall start tomorrow.答案2.【分析】lava【仿写】that is gained from practical experience; far more important3.【仿写】Weather permitting
