强调句可以强调形容词吗? 比如It was clear that?

强调句可以强调主语、宾语和状语,不强调形容词.强调句的一个基本特点是,把it is 和that去掉句子仍然完整,你可以用这条规则去检验强调句的真伪.如：It was in the park that I met him. (强调地点状语,去掉it was 和that,剩下I met him in the park.) It was Mr Li who taught me English.(强调主语,被强调的如果是人, 就用who, 去掉it was 和who, 剩下Mr Li taught me English.) It was clear that 是形式主语句型,不是强调句,如果去掉it was 和that是不能成句的.
再问： 谢谢还有两个问题麻烦你了 1，What did he say ___with those old rubber boots 为什么用he would do 而不是that he would do 2,The English Channel has always been a challenge to swimmers,______this challenge that appeals to about 100 swimmers a year 为什么用and it is
再答： 1. 把did he say 看做插入语，可以去掉，句子实际上是What would he do with those old rubber boots,他会怎么处理那些旧橡皮靴子，但受did he say 影响，句子语序变成陈述语序，就成了what did he say he would do with ..他说他会怎么处理那些橡皮靴子。 2. 前半分句是一个简单句，and后面是强调句，去掉it is 和that相当于this challenge appeals to about 100 swimmers a year, 被强调的是主语，英吉利海峡一直是游泳者的一个挑战，正是这一挑战每年吸引了约100个游泳者。整个句子是一个并列句。