当我到那里时会议已经开始半个小时了的翻译：When the Conference had already begun when I got there for half an hour 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

When I got there a half an hour when the meeting has begun

When the Conference had already begun when I got there for half an hour

When I to there the conference already started for half hour

When I went to a half-hour meetings had already begun the

When the Conference had already begun when I got there for half an hour