关于TPO17第一篇的一个句子This development,coming as it did when the bo

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关于TPO17第一篇的一个句子This development,coming as it did when the bottom had fallen out of the European economy,provided an impetus to a long-held desire to secure direct relations with the East by establishing a sea trade.此句子中间的插入语弄的迷迷糊糊,as it did 后面一截应该是 had fall out of / of the European economy还是 had fallen out / of the European economy,该插入语 coming as it did when the bottom had fallen out of the European economy,结构分析一下最好.
后面一截应该是 had fall out of / the European economy还是 had fallen out / of the European economy,

This development,coming as it did when the bottom had fallen out of the European economy,provided an impetus to a long-held desire to secure direct relations with the East by establishing a sea trade.此句子中间的插入语作非限制性定语相当于一个非限制性定语从句 ,as it did 方式状语修饰现在分词 coming .后面是时间状语从句修饰did
从句谓语应该是 had fallen out of /the European economy这是过去完成时.out of=from
主句谓语是 provided

关于托福TPO17听力的一个问题自学英语,When did it start raining.一个句子里的start doing是怎么回事? 英语翻译Today it appears much as it did when the colonists arriv with the development还是as the development? This can give rise to curious situation,as it did in the cas this can give rise to curious situations,as it did in the ca 一篇英语阅读理解是关于中外待客之道的,有一个问题是问When in Rome do as the Romans do.的 as it did in the case of ... 英语翻译This development effort,as it has been completed,would n This is the reason ____I did it. This is the way （）he did it填关系代词或副词.另求AS LIKE表像区别句子改错1、As the development of the society ,more and people use