Question

请帮忙分析一下一个英语句子的成分,个人怎么觉得句子有点怪怪的。

who do you know invented the toothpaste?

Answer 1

这是一个复合句。主句：do you know 从句：who invented the toothpaste 主句是一般疑问句而从句是特殊疑问句时，通常会出现这种把疑问词提到句首的情况。例如：What do you think your brother will give you as your birthday present?
也有人把do you know 看成插入语，不过这样的话，上例就不好理解了。

Answer 2

do you know 为插入语，分析句子时应提出来。who 为主语，invented 为谓语，the toothpaste 为宾语。

Answer 3

do you know 是插入语，主体是剩下的全部内容，即Who invented the toothpaste