2014高考英语语法总结:It的用法(三)

所属专题:2014年高考考后特别策划  来源:    要点:高考英语语法  
编辑点评: 2014年的高考即将到来,小编也想为广大考生出一份力。为大家整理出了2014高考英语语法总结,希望能帮到大家!本章节的内容为It用法的精讲,快来看看吧!

三、作强调词,构成强调结构用以帮助改变句子结构,使句子的某一成分受到强调。“It is (was) + 所强调的成分+ that (who) + 其它成分。在这个句型中,it本身没有词义。在使用强调句型时需注意以下几点:

1. 请注意强调句型的特殊疑问句例When was it that he changed his mind to take part in the activity?

2. 在强调原因状语从句时,只能强调由because所引导的从句例It was because he was ill that he didn't come to school yesterday.

3. 在强调not … until结构时必须把not与until一起放到被强调的位置上例It was not until she took off her dark glasses that I realized she was my brother.

4. 注意强调句型与定语从句的区别例It was at 7 o'clock that he came here yesterday.( 强调句型)It was 7 o'clock when he came here yesterday.(定语从句)四、It用作形式主语It替代作主语的从句、动词不定式、动名词,而把真正作主语的从句、动词不定式、动名词置于句尾。

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