知识点1:虚拟语气在主语从句中的运用[1]主语,从句,相关知识点

知识点1:从句作主语一定要按单数主语看待。［误］ What he said are right ［正］ What he said is right ［析］ 从句作主语一定要按单数主语看待。 ［正］ The rich is not always happy 知识点2:从句主语时谓语用单数还是复数Whoever breaks this law deserves a fine.

在主语从句中，谓语动词的虚拟语气用“should + 动词原形”的结构，表示惊奇、不相信、理应如此等。如：[2]谓语动词,主语,相关知识点

“many a +名词”作主语时 谓语动词用单数“many a +名词”作主语时,从意义上看是复数,但谓语动词常用单数.例如:Many a student has been sent to plant trees. 很多学生被派去植树.

It is necessary(important, natural, strange, etc.)that we should clean the room every day.
It was a pity (a shame, no wonder, etc.)that you should be so careless.
It will be desired(suggested, decided, ordered, requested, proposed, etc.)that she should finish her homework this afternoon.[3]homework,should,相关知识点

should 用于现在时态的句子中应译为"应该"，如：You should do your homework right away. 而 must加动词原形表示一种推测。 ［误］ She doesn't answer the doorbell. She should be asleep. ［正］ She doesn't answer the doorbell. She mu

注意：这种从句表示的是事实。如果说人对这种事实表现出惊奇的情感，就可用虚拟语气。反之，如果不表示惊奇等情感，that从句也可用陈述句语气。如：[4]that单词记忆法

◆记忆方法一：联想方式：th天河：at在记忆方法：那个天河区在广州

It is pity that you can't swim.
知识点2:主语从句中的虚拟语气[5]主语,从句,相关知识点

哪些从句作主语时可用it作形式主语It hasn’t been made clear when the conference is to take place. 会议什么时候召开还没有宣布。6. where从句It’s not known where she went. 她到哪里去了没人知道。It did not matter much where he lived. 他在哪里

It is his desire that a medical man should stay here. 他希望有一个医务人员留在这里。
三、It's desired…类
这种主语从句还常用在It is (was) desired (suggested, settled, proposed, requested, decided, etc. ) that...句型。如：
It is requested that a vote be taken. 建议付诸表决。
It is settled that you leave us, then? 那么你肯定要离开我们罗?
It was proposed that this matter be considered at the next meeting. 有人提议这事下次会议再讨论。[6]this,that,相关知识点

知识点1:指示代词This与That的前指与后指关于指示代词this与that的前指与后指，请注意以下两点：1. 如果是前指（即回指前文提到的事情），可用that或this。如：She married Jim, and this [that] surprised me. 她嫁给了吉姆，这使我感到很吃惊。John had a bad cold. That [This] was w

It is desired that this rule should be brought to the attention of the staff. 希望这条规则引起全体职员的注意。[7]ought to,should,相关知识点

中学英语语法复习——情态动词(shall,should,ought to)1. 表示均表示“应该”、“按理应当”，有时可互换，只是 ought to 语气更重，较多地反映客观，should 则强调主观看法，用于条件句表示“万一”，还有“竟然”之意。2. 谈论现在的情况，后接动词原形；谈论正在进行的情况，后接动词的进行式；谈论过去的情况，后接动词的完成式。如：He ought n