Among?the?scattered?rubble?were massive?stones?of?manifestly?artificial?shaping,?and?a?little?examination?disclosed?

the presence?of?some?of?that?prehistoric?Cyclopean?masonry?found?on?certain?Pacific?islands
and?forming?a?perpetual?archaeological?puzzle.

我現(xiàn)在的理解僅能看出第一個(gè)句子是倒裝句，Among?the?scattered?rubble是表語，massive?stones?of?manifestly?artificial?shaping是主語，and連接幾個(gè)并列的句子，但不懂forming為何用ing。

我猜測(cè)可能是后面3個(gè)句子是并列主語，forming?a?perpetual?archaeological?puzzle是一個(gè)名詞性從句，但如此中間那個(gè)句子就應(yīng)該是定語從句，如此中間那個(gè)句子就有點(diǎn)翻譯不同。

還望老師指點(diǎn)迷津。

?found?on?certain?Pacific?islands?and?forming?a?perpetual?archaeological?puzzle 這是過去分詞短語和目前分詞短語，分別做some?of?that?prehistoric?Cyclopean?masonry的后置定語。過去分詞表示被動(dòng)意義，目前分詞表示主動(dòng)意義。