Tom was astonished when he found himself to be popular again on the web
首先分析句子结构
主语tom
谓语was astonished
状语从句when he found himself to be popular again on the web
he found himself to be popular again on the web中he是主语 found谓语himself 是宾语to be popular again on the web是宾语补足语to be popular 就是to do 不定式作宾语补足语