Do you think reason why he was late is believable ? 这好像是复合句,请问如何分析其成分?是不是先要转换成陈述句?you do think reason why he was late is believable .由宾语从句和定语从句构成? why he was late 作定语修饰reason,所以是定语从句,那宾语从句是什么?是不是哪里还省略了that?