how do you know when you have the flu是什么复合句

问题描述:

how do you know when you have the flu是什么复合句

how do you know when you have the flu?
解析:这个句子中有一个宾语从句.when you have the flu是know的宾语.这是一个以when做疑问词的疑问句做宾语从句,所以应该改为陈述语序.
句意:你如何知道你是何时染上的流感?