②Her health broke down under the pressure of work.

　　③My girlfriend had broken up with me.

　　④Robbers broke in and made off with 8,000.

　　⑤Protesters tried to break through a police cordon(警戒线)．

　　(2)单句改错

　　—I’m surprised to hear that Sue and Paul have broken in.

　　—So am I．They seemed very happy together when I last saw them.in→up

　　23

　　Without these naturally occurring gases，the sun’s rays would bounce back into space leaving the Earth cold and impossible to live on.如果没有这些自然产生的气体，太阳光将会被反射回太空中去，地球将处于寒冷之中，不适合生命的存在。

　　句型公式：without引导的含蓄条件句

　　介词短语Without these naturally occurring gases代替虚拟条件句，用来表达虚拟的事实。有时表假设的情况隐含在一些词或短语中如otherwise，but for，or等。

　　(1)Without the air to hold some of the sun’s heat，the earth at night would be freezing cold，too cold for us to live on.

　　如果没有大气保持太阳的热量，夜晚的地球将会非常寒冷，冷得让我们无法生存。

　　(2)He was busy yesterday，or he would have helped you with your experiment.

　　昨天很忙，要不然他就会帮助你做实验的。

【（豫皖京闽粤通用）2017届高考英语北师大版一轮自主复习学案：book8 Unit 22《environmental protection》】相关文章：

★ 【三维设计】2017届高考英语（江苏专用）二轮复习课件：必修4 Unit 1《Advertising》

★ 【人教版】2014届高考英语一轮复习指导考点针对练：必修1 unit1《Friendship》

★ （全国通用）2014届高考英语一轮单元复习 限时强化训练一

★ 2017届江苏省淮安市新马中学高考牛津译林版英语一轮复习活动单：模块7 unit 3《The World online》

★ 【浙江专用】2014届高考英语一轮复习课时作业(三十八)选修8Unit 3《Inventors and inventions》

★ 【北京专用】2014届高考英语一轮复习方案课时作业：必修3 Unit 3 The Million Pound Bank Note

★ 【浙江专用】2014届高考英语一轮复习课时作业(二十八)选修6Unit 3《A healthy life》

★ 【浙江专用】2014届高考英语一轮复习课时作业(三十二)选修7Unit 2《Robots》

★ 【浙江专用】2014届高考英语一轮复习课时作业(二十九)选修6Unit 4《Global warming》

★ 【浙江专用】2014届高考英语一轮复习课时作业(二十三)必修5Unit 3《Life in the future》