Unit4课文名词从句.ppt

1. What it was to become was uncertain until between 4.5 and 3.8 billion years ago when the dust settled into a solid globe. 以后它会变成什么没人能知道，直到38-45亿年前，这团尘埃才慢慢形成一个固体的球状物。,What it was to become was uncertain until between 4.5 and 3.8 billion years ago when the dust settled into a solid globe. （主语从句）,2. The earth became so violent that it was not clear whether the shape would last or not. 地球变得如此激烈动荡，以致于不知道这个固体形状是否会继续存在下去。 仿写： 她病得如此严重（seriously)以致明天是否能来还不清楚。 She was so seriously ill that it was not clear whether she will come tomorrow or not.,The earth became so violent that it was not clear whether the shape would last or not. （主语从句, it 在这里作形式主语）,3. What is even more important is that as the earth cooled down, water began to appear on its surface. 更为重要的是，地球冷却下来后，地球的表面就开始出现了水。 仿写： 更为重要的是，我们要认真对待作业。（takeseriously) What is more important is that we should take our homework seriously.,3. What is even more important is that as the earth cooled down, water began to appear on its surface.（主从、表从）,4. It was not immediately obvious that water was to be fundamental to the development of life.,4. It was not immediately obvious that water was to be fundamental to the development of life. （主语从句） 水会对生命的发展起关键作用， 这一点在 当时并不明显。 结构 这是个复合句, it是形式主语, 真正的 主语是后面的that从句 句型： It is obvious that 显然. 短语： be fundamental to.对.是必要的根本的,1. 显然老师已经原谅了他所做的一切。 _the teacher has forgiven him for what he has done. 2. 很明显他昨天没有说实话。 _ yesterday.,It was obvious that he didnt tell the truth,It is obvious that,仿写 根据汉语意思, 完成英文句子,5. What many scientists believe is that the continued presence of water allowed the earth to dissolve harmful gases and acids into the oceans and sea.,5. What many scientists believe is that the continued presence of water allowed the earth to dissolve harmful gases and acids into the oceans and sea. （主从、表从） 很多科学家相信，由于地球上长期有水存在， 使得地球得以把有害气体和酸性物质溶解 在海洋里。 搭配 allow sb./sth. to do sth. 允许某人/某物做某事； 使得以 dissolve sth. into sth. 使融入,6. Why they suddenly disappeared still remains a mystery. 7. So whether life will continue on the earth for millions of years to come will depend on whether this problem can be solved.,6.Why they suddenly disappeared still remains a mystery. （主从）,So whether life will continue on the earth for millions of years to come will depend on whether this problem can be solved. （主从、宾从）,结构分析：whether life will continue on the earth for millions of years to come是一个_ 从句; will depend on是谓语；whether this problem can be solved作为介词on的 _ 从句。 搭配: millions of years to come 在接下来的数百万年里(时间+to come是个常用表达法),宾语,主语,So whether life will continue on the earth for millions of years to come will depend on whether this problem can be solved. 所以, 在未来的数百万年中, 生命能否在地球上延续取决于这个问题能否得到解决。(B3 P26) 仿写： 我们是否进行考试取决于我们是否按时完成的任务。 Whether we will have an exam depends on whether we will finish the task on time.,1. They were in time to produce carbon dioxide, nitrogen, water vapour and other gases, which were to make the earths atmosphere. 2. This produced a chain reaction, which made it possible for life to develop. 3.They multiplied and filled the oceans and seas with oxygen, which encouraged the later development of early shellfish and all sorts of fish. 4. They are putting too much carbon dioxide into the atmosphere, which prevents heat from escaping from the earth into space.,2. This produced a chain reaction, which made it possible for life to develop. 这就产生了一系列的反应, 使得生命就有可能开始发展了。(L25 P26) 句型 make it+ adj. +for sb. to do使某人做某事 说明 it是形式宾语, 后面的to do才是真正的宾语。,1.学英语使我们和外国人交流成为可能。 2.这场雨使我们长途旅行很困难。 The rain _ _a long journey.,made it quite difficult for us to go on,Learning English makes it possible for us to communicate with foreigners.,仿写 根据汉语意思, 完成英文句子。,3. They are putting too much carbon dioxide into the atmosphere, which prevents heat from escaping from the earth into space. 他们把过多的二氧化碳释放到大气层中, 这使得地球上的热不能释放到太空中去。(B3 P26),prevent/stop/keep.from 阻止/防止做/发生 protect .from . 保护不受 提示 在主动语态的句子中, stop和 prevent后的from可省略, 但keep后的from不能省略; 在被动语态中, 此三个短语的from 均不可省略。,运用 根据汉语提示完成句子。 雨使我们不能踢足球了。 The rain _ _. 人们采取行动, 防止了环境的恶化。 People took measures and thus _ _.,prevented the environment from getting worse,prevented us from playing football,Read the whole passage and complete the main idea of each paragraph.,Para. 1 The formation of the universe Para.2 The formation of_ Para.3 The importance of_ Para. 4 The development of _ Para. 5 The arrival of_,the earth,water,plants and animals,human beings,1. What is even more important is that as the earth cooled down, water began to appear on its surface.（主从、表从） 2. It was not immediately obvious that water was to be fundamental to the development of life. （主语从句） 3. Why they suddenly disappeared still remains a mystery. （主从） 4.This produced a chain reaction, which made it possibl