谁帮我分析这句话的句型your friend comes to school very upset

很简单：1 your friend comes to school very upset (在你的句子里very upset做your friend的主语补足语)2 ==Your friend is / looks very upset WHEN he comes to school。3 your friend （主语）comes（谓语） to（介词） school （介词的宾语）very upset （主语补足语)4 to school -----地点状语