Question

请帮忙分析一下这个句子的成分、结构，谢了哈。。

Rational appeals play a much smaller role in advertisements for children that emotional appeals and psychological associations do.
这个句子大概意思明白，但是句子语法、成分不太懂。

Answer 1

Rational appeals 是主语 play a much smaller role 谓语 in advertisements for children 补充成分 that emotional appeals and psychological associations do. （that 应该改为than吧），这是比较级的用法。

追问

TOEFL原文，不会错的！