温州市永嘉中学楠江校区高二英语人教版必修3：Unit4AstronomythescienceofthestarsLanguagepoints1必修3课件.ppt

learning about language;Please retell the passage according to the pictures.;Big Bang;;Insects and amphibians;1. No one knows exactly how the earth began, as it happened so long ago.;2. However, according to a widely accepted theory, the universe began with a “Big Bang” that threw matter in all directions. begin with=start with：“以……开始”.;1) to begin with=to start with 这两个词组都可以单独使用,表示“首先; 第一; 起初; 最初”。 在句中作状语。 e.g. To begin/start with, I couldn’t like him at all. 起初, 我一句也没弄明白。 ;3. 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. What is even more important is that as the earth cooled down, water began to appear on its surface. [考点] what引导的________从句，第一句what 在从句中作become的_____语，第二句what在从句中作______语。;1. ______________________（使大家吃惊的是）is that he didn’t come to the meeting. ;[考例1] _____ was most important to her, she told me, was her family.（山东 2008） A. It B. This C. What D. As [点拨]选B。what引导主语从句，并在 从句中作主语。;[考例2] ______ is known to us all is that the 2008 Olympic Games will take place in Beijing.（福建 2008） ______ is known to us that the 2008 Olympic Games will take place in Beijing. ______ is known to us all ，the 2008 Olympic Games will take place in Beijing. A. It B. What C. As D. Which;[点拨] (1)what引导主语从句并且在从句中作主语。 (2)若选it则应去掉第二个is；it 为形式主语，that引导的是真正主语（从句）。 (3)as引导定语从句，若选as则应去掉is that。 ;4. The earth became so violent that it was not clear whether the shape would last or not. （1）so…that…如此的…….以致于 引导结果状语从句 （2）it was not clear whether the shape would last or not 在从句中做结果状语， 其中it是形式主语，whether…or not引导的 从句做真正的主语 ;5. They were in time to produce carbon... in time: sooner or later; eventually; 早晚，迟早 I’ll see him in time. in time (for sth. /to do sth.): not late来得及 She will be back in time to prepare dinner.; 与time相关的短语: in no time 立刻, 马上 at times 有时 at a time 每次;一次 once upon a t