强调句型与定语从句
a.强调句型的结构：it is/
was 被强调的成分 that...
b.强调的成分是主语、宾语和状语.
c.强调句型可用“还原法”来判断,若删除强调句型结构后,句子能还原为一个完整的句子,就是强调句.
d.where引导的定语从句则修饰限制表示地点的名词：spot,place,house,school,factory,station等.
e.注意强调句型指时间、地点时不能用when或where.试比较：
It was not until 1920 that regular radio broadcast began.(强调句)
It was 192 0when regula rradiobroadcast began.(定语从句)
请注意坚持这条原则：把it is.that/who拿掉,如果还是一个完整的句子,那就是强调句,如果不是,那就是定语从句．
你还应该熟练的运用强调句的变种句型
强调句的疑问句:are/is +it+强调部分+that .
