句子结构

　　the reason often given for A is that B

　　结构来源

　　The reason often given for the low regard in which smell is held is that, in comparison with its importance among animals, the human sense of smell is feeble and undeveloped.

　　[译] 嗅觉不受重视的原因通常是，与嗅觉在动物中的重要性相比，人类的嗅觉显得微弱且不发达。

　　*此句出自雅思阅读文章。

　　结构解析

　　此结构可表达A的原因通常是B”的意思，这里A是一个名词性成分，B是一个完整的句子。我们在使用这个结构的时候可以对比the reason for A sterm from B这个结构。the reason often given for A is that B中的often given for A具有人们通常认为…”的意思在里面，可能下一句就会有一个but转折一下，表达作者不同的观点。另外sterm from B中的B只是一个名词性成分，表示A发生的因素。而the reason often given for A is that B中的B是一个完整的句子，表示A发生的原因。我们在写作文选择句型结构时不可忽略上述细节，建议多研究例句，并且多模仿造句揣摩这个句型结构的含义。

　　模仿使用

　　The reason often given for being late for school by a student is that his alarm clock doesn’t work.

　　[译] 学生为上学迟到找的理由通常是闹钟坏掉了。

　　适用题目举例

　　IELTS Writing 63

　　The society would benefit from a ban on all forms of advertising because it serves no useful purpose, and can even be damaging. To what extent do you agree or disagree with this opinion?