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6.The other two climbed into the crater to collect some lava for late study,but this being my first experience,I stayed at the top and watched them.(P35) 另外两个人攀下火山口去收集日后研究用的岩浆，我是第一次经历这样的事,所以留在山顶上观察他们。 this being my first experience是“代词+v-ing”构成的独立主格结构，在句中作原因状语。 独立主格结构的构成：独立主格结构的逻辑主语与主句的主语不是同一主语，它的构成为“主格词（代词主格或名词）+非谓语动词”，在句中作状语，表示时间,原因，条件和伴随。 ◆即学即练 将下列句子改成含独立主格结构的句子。 (1)Because her glasses were broken,she couldnt see the words on the blackboard. _____________________________________________ (2)Since so many people will help him,he is sure to succeed. _____________________________________________ (3)If the weather is fine,we will go for a picnic tomorrow. _____________________________________________ 答案： (1)Her glasses broken,she couldn，t see the words on the blackboard. (2)So many people to help him,he is sure to succeed. (3)The weather being fine,we will go for a picnic tomorrow. 7．What does the writer find impressive about volcanoes even after studying them for many years?(P35) 作者研究火山20年对它印象最深的是什么？ ◆词语归纳 impress vt.给予某人深刻印象 impression n.印象 impressive adj.印象深刻的 impress sth.on/upon one，s mind使某人铭记某事 leave/make an impression on/upon sb.给某人深刻印象 ◆即学即练 用上述词语翻译下列小片段。 国内外游客对深圳有深刻印象。首先，他们对这个城市的道路和交通印象良好。另外，这个城市的友好和好客也给他们留下深刻印象。最重要的是，深圳的很多名胜尤其令人印象深刻，如世界之窗，欢乐谷等。 _____________________________________________ _____________________________________________ _____________________________________________ | 
