before vs时态 句子一条
Everyone was frisked before getting on the plane.
这是个成句喔,是正确的没错.
根据时间的推算,如果是这样：
Everyone had been frisked before he got on the plane.
这样也对
那么、
如果把before的从句换成非谓语：
Everyone had been frisked before getting on the plane.
这样okay么?