过去分词放在句首的例句（过去完成时例句10句带翻译）

作时间状语时,可转换为when或while等引导的从句,通常放在句首。

如: Seen from the top of the hill (= When it is seen from the top of the hill), the school looks like a big garden

看这里：gone are the days when we used the foreign oil.