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题目
请教这个句子中when的用法,嘻嘻……
我把这段话都打出来.文章是关于百慕大三角的.
Sometimes a single animal is left on board.On one ship there was a dog,on another a canary in cage.Only once did an animal disappearalong with the crew.That was when(就是这个) a parrot as well as the people on board disappeared from a ship which was later found drifting and empty.

提问时间:2020-12-18

答案
句子的主体是that was from a ship
which was later found drifting and empty.是定从 形容ship
when ...做时间状语从句
整体的意思是 就是一只鹦鹉以及人都消失的那只船,不久之后被发现在海上飘荡,空空如也.
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