参考书的意思是说,你把it is...that...(强调句的构成特征)去掉后,整个句子还是完整的。比如此句,去掉it is...that...后变为him we met today=we met him today.
你看,句子要表达的意思实际上就是we met him today,但是为了强调him,所以把要强调的部分提前,用it is...that...构成一个强调句
that 不当任何成分的,
至于你举得那个例子,是强调句。
变成正常语序是
We met him today.
这时候就很明显了吗。met的宾语是him
而并不是we met that
是不充当成分的
去掉it is that后,句子依然完整。这就是强调句的特点。
It is him that we met today典型的强调句。去掉it is that后,是we met him today。
met的宾语是him
that 只是定语从句的引导词,不充当句子成分