Wise parents have a better idea of what they should do.这句话的语法结构和相应的语法知识
问题描述：
Wise parents have a better idea of what they should do.这句话的语法结构和相应的语法知识
如题
答
句子结构
wise parents 主语
have 有
a better idea 宾语
of what they should do 为介词短语做后置定语,修饰宾语idea
what they should do为宾语从句,做介词of的宾语.
宾语从句中,what为引导词,并在从句中做宾语；
they 从句主语
should do 从句谓语