主语从句讲义及练习 主语从句一 用从句充当句子的主语 主语从句引导词 所作成分 从属连词 连接代词 that,whether 不作成分 what、whatever、who，whoever等 主语、宾语、表语、定语 ·that引导主语从句时，只起连接作用，没有具体意义，在从句中不作任何成分，也不能省略，由that引导的主语从句可改为由it作形式主语的句子。 ·whether引导主语从句可放句首、句中，在从句中不作任何成分，意为“是否”，且不能省略。 ·＊whether引导主语从句，不能由if代替。 2．wh-类连接词引导的主语从句Wh-＋主语＋谓语... ·连接代词（who、whom、whose、what、whoever、whomever、which等）在从句中作主语、宾语、表语、定语。 ·连接副词（when、where、how、why、whenever、wherever、however）在从句中作时间、地点、方式、原因状语。 ①That he will come is certain.他要来，这是肯定的。 主语从句 It is certain that he will come. 形式主语 真正主语（主语从句） ②Whether you'll win this game or not doesn't matter. 主语从句 谓语 你是否能赢这场比赛不重要。 →It doesn't matter whether you'll win this game or not. 形式主语 真正主语（主语从句） ①Who will take charge of the task hasn't been decided. 连接代词充当主语 谁来负责这项任务还没有决定。 ②What we should do next remains unknown.我们下一步该干什么还不知道。连接代词充当宾语 ③Why they suddenly disappeared still remains a mystery. 连接副词充当原因状语 它们为什么突然消失了还是个谜。 3．it作形式主语的主语从句 It＋系动词＋形容词＋that从句 ·常见可用于这种结构的形容词 likely 可能的 certain 肯定的 clear 清楚的 obvious 明显的 important 重要的 necessary必要的 It＋系动词＋名词＋that从句 ·常用于该结构的名词 a pity 遗憾 a wonder 奇迹 a fact 事实 a shame 遗憾 a surprise 意外 ①It is likely that there will be a snowstorm tomorrow. 很可能明天会有一场暴风雪。 ②It is necessary that you should master English. 你很有必要掌握英语。 ①It is a pity that you didn't attend the lecture yesterday. 你昨天没参加讲座真是遗憾。 ②It is no wonder that you've achieved so much success. 难怪你取得了这么大的成功。 It be＋过去分词＋that从句 ①It is said that we will have our final exams next month. ·常用于该结构的过去分词 据说下个月我们期末考试。 said 据说 reported 据报道 ②It is reported that talks between the two countries are making great progress. suggested 有人建议 hoped 有人希望 well-known很著名 thought 有人认为 据报道两国之间的谈判取得了很大进展。 believed 有人相信 considered 据认为 It＋特殊动词＋that从句 ·用于该结构的特殊动词 seem看上去 appear 显得 happen 碰巧 matter 重要 turn out／work out 结果 occur to／hit／strike 想起 make a／no difference 有／没有影响 ①It happened that I had been away when he called. 他打电话时，我碰巧不在家。 ②It seems that they will win the game. 看起来他们会赢得这场比赛。 ③It occurred to him that Joe was afraid of being alone. 他突然想到乔害怕独自一个人待着。 I.单句填空 1. you don't like him is none of my business. 2. is a fact that English is being accepted as an international language. 3. breaks the rule deserves to be punished. 4. they will come or not won't make much difference. 5. we will do is to leave a note to tell Mum we will be back late. 6.It is natura ... ...
