表语从句讲解及专项练习答案.docVIP

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 couldnt 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。 ★ Thats what he is worrying about.那就是他在担心的事。 ★ Thats what we should do.那是我们应该做的。 ※由关系副词引导的表语从句。 关系副词 when, where, how, why 除在句子起连接作用外，在从句中还充当时间，地点，方式或原因状语，本身具有词义。 例如： ★Go and get your coat. Its where you left it. 去把雨衣拿来。就在你原来放的地方。 ★ I had neither a raincoat nor an umbrella. That’s why I got wet through. 我们既没伞也没雨衣，这是我们淋湿的原因。 ★ That is how mice ruin many stores of grain every year.那就是老鼠是怎样每年损害大量粮食的。 ★ That is what he is worried about.那就是他所担心的。 ※ 由连词because，as if/as though等引导的表语从句。 ★ It looked as if it was going to snow.看起来好像要下雪了。 ★ Thats because we never thought of it.这是因为我们从未想过此事。 ★ It seems as if he didn’t know