It was a while before Tom could appreciate the joke .

问题描述:

It was a while before Tom could appreciate the joke .
while在句子中的作用,句子成分各有哪些,怎么翻译?

Tom很快就听懂了笑话.
while是一会儿,It was a while表示时间短暂.成分:主、谓、宾、从句.详细点。主语It嘛~ 谓语is 宾语 a while,before Tom could appreciate the joke就都是从句咯~