一英语新人教版必修3同步精品课件unit4astronomythescienceofthestars-learningaboutlanguage.ppt

高一英语新人教版必修3 同步精品课件 unit4 astronomy the science of the stars - learning about language;Ⅰ.词汇过关 1．________adj. 温和的；文雅的→________ adv. 2．________ n. 卫星→______n. 行星→______n. 恒星 3．________n. 气候 4．________v. 碰撞；坠落 5．________n. 万有引力；重力 答案：1.gentle; gently　2.satellite; planet; star　3.climate 4．crash　5.gravity;Ⅱ.短语自查 1．挡住光线________________ 2．as a result________________ 3．give birth to________________ 答案：1.block out　2.结果　3.分娩；产生;Ⅲ.语法练习 判断哪些句子是主语从句。 1．It is certain that Miss Smith will do well in the final exam. 2．We thought it strange that Tims father did not come here yesterday. 3．The problem is that no one can replace him in teaching English. 4．They were all very much worried over the fact that you lost heart when you failed in the exam.;5．Has it been decided where the players will perform the experiment? 6．I dont believe they have finished their work yet. 7．It was Tom that came late for school yesterday morning. 8．That we try again is a good idea. 9．It seems that he is very disappointed. 10．It was reported that two men were killed in the accident. 答案：1、5、8、9、10是主语从句。 ;语法专区 名词性从句(二) 主语从句 1．概念 在复合句中充当主语的句子叫主语从句。主语从句主要由that和wh-词引导。;2．类型 1)主语从句位于句首。如： What he wanted to see was an end to all the armies of the world. 他想要看到的是世界军备竞赛的结束。 2)主语从句位于句尾，使用先行词it作形式主语。如： It was right that the temple was rescued. 这座庙被拯救了，这很好。 在下列情况下，一般使用形式主语it，而将真正的主语从句放在句尾。;(1)谓语是seem, appear, be possible/impossible, be a pity, be a wonder, be likely等。如： ①It appeared to scientists on earth that the stars had moved. 在地球上的科学家看来，这些星体已经移动了。 ②Its a wonder you recognized me. 你能认出我来，真是奇怪。;(2)在It is known...，It is said...，It is hoped...，It is believed...等惯用的被动结构中。如： It is believed that before writing was developed, people in China used to keep records by putting a number of stones together. 据信，在文字发明之前，中国人靠把许多石头聚集在一起来作记录。 需要注意的是：当主语从句放在句尾而用形式主语时，形式主语只能用it，而不能使用this, that等代词。如： Does it matter if he cant finish the job on time? 若他不能按时完成工作要紧吗？;3．连接词及其用法 1)that, whether/if 连接词that本身没有意义，不作句子成分，只表示从句的开始，位于句首时，that不能省略；w