公共英语等级考试写作命题规律（二）
● It引导的形式主语句子与其他句型的转换
「例句」
5.He spent 4 hours in doing his homework yesterday.
It took him 4 hours his homework yesterday.
6.It seems that they like pop music.
They to like pop music.
「正确答案」5.to do6.seem
「规律分析」这部分要求了解代词it在句子中的各种用法。it在英语中是个相当活跃的代词，它可以作形式主语、形式宾语和引导强调句等。
● 一些习惯用法的不同表示法
「例句」
7.They have studied English for 20 years.
They began to study English .
8.He went to the class at 9 o‘clock.
He didn‘t go to the class 9 o’clock.
「正确答案」7.20 years ago8.until
「规律分析」这部分要求掌握英语中一些习惯用法的表达方式。在改写句子时，要求用不同的句型或不同的词表达出相同的意思。
● 词或词组间的互换
「例句」
9.He spent 20 dollars buying this book.
He20 dollars this book.
10.She does well in English.
She is English.
「正确答案」9.paid……for10.good at
「规律分析」这部分考查同义词或词组的替换。有些词虽然意义相近或相同，但往往在用法和结构搭配上有区别，考生应尤其注意。
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