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• 6*** 2005-12-26 14:40:09

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    出于句子平衡的需要，有些动词的宾语要放在补足语的后面，在动词后要加it 做形式宾语。 例如：I find it difficult to learn English well。 I think it important to learn English well。
     I don't think possible for us to finish the work in two weeks。
• 问*** 2005-12-25 16:49:13

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  固定句型：it is + adj+(for sb.) to do sth. 在从句中通常没有be动词，及...it +adj + to do sth. It is important (for us ) to learn English well. The old man said it useful to help others.
• 周*** 2005-12-25 15:58:31

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  I don’t think IT possible to master a foreign language without much memory work。 IT 在这里作形式主语，而真正的主语是master a foreign language without much memory work。
• 莎*** 2005-12-24 22:57:58

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  think it ...=think it is...是一个省略结构
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