[初中英语电教论文]
It既是高中英语教学重难点,也是近几年高考的热点语法。它的用法极其广泛,既可以作人称代词,也可以作非人称代词,表示时间、距离、气候等;既可以充当形式主语和形式宾语,也可以用于强调句结构中;它还常常用在某些动词或特殊词类之后,构成习惯用语。下面就其使用的重点及难点,主要通过句式加以总结: 一、It is+被强调部分+that 该句型是强调句型,将被强调的放在前面,其他部分置于之后,强调的主语如果是人,可以用来替换,如果把这种句型结构划掉后,应该是一个完整无缺的句子,这也是判断强调句型与其他从句的方法。 It was they that (who) cleaned the classroom yesterday. It was in the street that I met her father. It was with great joy ( D ) he received the news that his lost daughter had been found. (2004 福建) A. because B. which C. since D. that 二、It is not until +被强调的部分+ that 该句型译成汉语“直到……才”,可以说是的强调形式。 It was not until she took off her dark glasses that I realized she was a film star. =Not until she took off her dark glasses did I realize she was a film star. =I didn’t realize she was a famous film star until she took off her dark glasses.  ……
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