题目内容

15．They built many tall buildings in Ordos last year．（改为被动语态）
Many tall buildingswere built in Ordos by them last year．

分析 去年他们在鄂尔多斯建造了许多高的建筑物．
去年在鄂尔多斯许多高建筑物被建成．

解答 答案：were built．原句中的built得知是一般过去时，改为被动语态的结构是：主语+was/were+过去分词+by+宾语．主语是buildings是复数，故were，bulid的过去分词是built．故答案是were built．

点评 此题要求把主动语态变为被动语态，做这类题时，首先由原句的谓语确定采用哪种被动语态结构，再看主语，二者结合即可得出答案．

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