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一、要点扫描作为名词性从句中的一个重要内容，有关表语从句考查的题目在历年高考题中经常出现。表语从句在复合句中作主句的表语，对主语的内容加以补充或说明，位于主句的系动词之后。对表语从句的复习我们要注意以下几点：1. 表语从句常跟在系动词be, seem, look等词后面。如：The question was who had done it.It looks as if its going to snow.2. 表语从句常用的引导词有：从属连词that, whether；连接代词who, what, which；连接副词when, where, why, how等。此外，as if (though), because也可以引导表语从句。如：It seems as if he would soo……