1)在主语从句中:
It is demanded / necessary / a pity + that…等结构的主语从句,谓语动词用should 加动词原形,should 可省略。
可用的词有三类:
a.suggested, ordered, required, proposed, demanded, requested, insisted等
b.important, necessary, natural, imperative, strange等
c.a pity, a shame, no wonder等
2)在宾语从句中的应用
在表示命令、建议、要求等一类动词后面的从句中,像order, suggest, propose, require, demand, request, insist, command, insist + (should) do等。如:
I suggest that we (should) hold a meeting next week. 我建议下周召开个会议
3)在表语从句,同位语从句中的应用
suggestion, proposal, idea, plan, order, advice等名词后面的表语从句、同位语从句中要用虚拟语气,即(should)+动词原形。例如:
My idea is that we(should)get more people to attend the conference.我的想法是让更多的人来参加会议。
I make a proposal that we(should)hold a meeting next week.我提了个建议,下周我们开个会。
同位语从句
一、在复合句中用作同位语的从句叫同位语从句。它一般跟在某些名词后面,用以说明该名词表示的具体内容。如:
I heard the news that our team had won.我听到了我们队获胜的消息。
I had no idea that you were here.我不知道你在这里。
二、可以跟同位语从句的名词通常有new,idea,fact,promise,question,doubt,thought,hope,message,suggestion,word(消息),possibility等。如:
I’ve come from Mr wang with a message that he won’t be able to see you this afternoon. 我从王先生那里来,他让我告诉你他今天下午不能来看你了。
三、英语中引导同位语从句的词通有连词 that,whether,连接副词 how,when,where等。(注:if,which 不能引导同位语从句。)如:
l have no idea When he will be back.我不知道他什么时候回来。
He must answer the question whether he agrees to if or not.
他必须回答他是否同意这样一个问题。
四、有时同位语从句可以不紧跟在说明的名词后面,而被别的词隔开。 如:
Several years later,word came that Napoleon himself was coming to inspect them.
几年以后,有消息传来说拿破仑要亲自视 察他们。
The thought came to him that maybe the enemy had fled the city.
他突然想起可能敌人已经逃出城了。