主语从句超全讲解加练习.docVIP

1）从属连词：that， whether等. that 引导主语从句只起引导作用，本身无实际意义，在主语从句中不充当任何成分，但不能省略。 That he will win is certain.他肯定会赢。 Whether he’ll come here isn’t clear. 他是否会来这里还不清楚。 注意: 由that 引导的主语从句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: 1. That he will refuse this piece of advice is impossible. 2.That they should like each other is natural. 这样就构成了下面一些常用句型: 1) It is + n. +从句 　 It is a pity/shame that... 遗憾的是…… 　 It is a surprise that…令人惊奇的是… 　 It is a fact that… …是事实 It is common knowledge that… …是常识 ______________(很遗憾)we lost the match. _____________(这是事实)he cheated in the exam. 2) It is + adj. +从句 　 It’s certain that… 肯定… 　 It is possible that... 很可能…… 　 It is unlikely that... 不可能…… It is obvious that… 很明显… It is necessary \important \natural\... that…+(should) do ________________(很可能)she will come back tomorrow. *_________________(很明显)this measure is effective. 3) It +不及物动词+从句 It happened that... 碰巧…… It occurred to me that…我突然想起… _______________(刚好)I came into the office at that time. *____________________(我突然想起)I forget to sent the letter. 4) 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..人们相信/认为…… It is suggested that + (should）do... 建议…… 　 __________________(据报道)20 people were killed in the accident. *_______________(建议)we should eat more vegetable and do more exercise. 2.连接代词who ，what ，which, whatever, whichever, whoever (Who, whom, which, what可以和ever构成合成词，和what一样引导从句，ever起到强调作用。它们在句子中担任主干成分，并用陈述句形式) What many scientists believe is that the earth is round … Who will take part in the meeting has not been decided. Whoever breaks the law will be punished. Whatever was said here must be kept secret. 连接副词when，where， how， why等。 Why they suddenly disappeared still remains a mystery. When they will leave is not decided. How we will paint the house has not been decided. 注意: 1）主语从句在句首时，必须由连接词引导，不能省略这些连接词 误：They should like e