To our joy,they arrived safely 。To our joy,作状语,修饰整个句子;they作主语,arrived动词的过去式作谓语;safely副词作状语,说明arrived的具体情况或方式。
I wonder where he came from 。这是一个带宾语从句的复杂句。I 作句子主语,wonder作谓语,where he came from是句子作宾语,即宾语从句。在该从句中,he 是主语,came 是谓语,where---from是地点状语。
追问这句呢 His face turned red
追答His face作主语;turned是一个系动词,作谓语;red是形容词作表语,表示一种状态。