人教版高一有必修3_Unit4 Grammar(共20张PPT).ppt

energetic violent gentle patient angry cruel terrible calm relaxing shocked harmful kind friendly jealous Grammar What part does the underlined part serve as in each sentence? A tree has fallen across the road. You are a student. To find your way can be a problem. Smoking is bad for you. “How do you do?” is a greeting. What she said is not yet known. That we shall be late is certain. It is certain that we shall be late. We can see from these sentences that a sentence serves as subject, so we call it Subject Clause. 注意: 有时为了使句子结构平衡, 避免 “头重脚轻”, 常用 it 作形式主语, 而把从句放在后面。 例如: 　　It is a pity that she has made such a mistake. 她犯了这样一个错误, 真是遗憾。 这样就构成了下面一些常用句型: 1) It is + adj. / n. +从句 　 It is a pity/shame that... 遗憾的是…… 　 It is possible that... 很可能…… 　 It is unlikely that... 不可能…… 2) It +不及物动词+从句 　 It seems/appears that... 似乎…… 　 It happened that... 碰巧…… 　3) It + be +过去分词+从句 　　It is said that... 据说…… 　　It is known to all that... 众所周知…… 　　It is reported that... 据报道…… 　　It is believed that... 据信……;人们相信…… 　　It is suggested that... 有人建议…… It must be pointed out that... 必须指出…… It has been proved that... 已证明……. 如: It is believed that at least a score of buildings were damaged or destroyed. 据信, 至少有二十座楼房遭到破坏或彻底毁掉。 5) . 用于It is important / natural / necessary / impossible that...句型中, 主语从句应使用虚拟语气, 谓语动词用\“should + 动词原形\”的形式, should有时有感情色彩。 1. _____ you don’t like him is none of my business. 2. _____ he said at the meeting astonished everybody present 3. ________ the 2000 Olympic Games will be held in Beijing is not known yet. 4. ________ we’ll go camping tomorrow depends on the weather. 5. ________ leaves the room last ought to turn off the lights. Pair work: Please use the Sub