表语从句讲解及专项练习概念： 表语从句是在复合句中作表语的名词性从句。放在系动词之后，一般结构是“主语+系动词+表语从句"可以接表语从句的连系动词有 be， look， remain, seem 等。★ The trouble is that we are short of money。困难是我们资金短缺。★ That is why stone walls are used instead of fences around New England fields。这就是为什么在新英格兰用石头墙而不用栅栏的原因.★ At that time， it seemed as if I couldn’t think of the right word anyhow。当时,我似乎怎么也想不出一个恰当的字眼来.引导表语从句的词：从属连词 that、whether、as though、 as if（That 引导表语从句时,在口语中，间或可以省略。)关系代词 who, what, which, whom， whose, whatever， whoever， whomever， whichever 等;关系副词 when, where， why, how, however, whenever, wherever 等。※ 由从属连词 that，whether 引导的表语从句。that 在引导表语从句时无词义，而 whether 有词义，意为、“是否”。这时主句的主语常常是些抽象名词，如 question（问题)，trouble(麻烦)，problem(问题），result（结果），chance（可能性），suggestion（建议），idea（想法），reason（理由)等。表语从句对主句主语进行说明、解释，使主语的内容具体化。例如：★ The trouble is （that） she has lost his money. 麻烦的事是他丢了钱。★ The question is whether we need more ice cream。问题是我们是否还需要一些冰淇淋。★ The problem was that it was too valuable for everyday use.问题是它作为日常之用太贵重了。★ What she couldn't understand was that fewer and fewer students showed interest in her lessons. 我们不能理解越来越少的学生对他的课不感兴趣。※ 由关系代词引导的表语从句。关系代词 who， what, which, whom， whose， whatever， whoever， whomever， whichever等引导表语从句，在句中作主语、宾语、表语,关系代词不能省略。例如：★ The question is which of us should go.问题是我们哪一个应该去。★ The problem was who could do the work。问题是谁能做这项工作。★ That’s what he is worrying about。那就是他在担心的事。★ That’s w...
