Question

17．They built a new school last year．（改为被动语态）
A new school was built by them last year．

Answer 1

分析 他们去年建了一所新学校．

解答 答案：A new school was built by them last year．考查被动语态．被动语态主语用a new school，是动作build修建的承受者，由last year去年，可知，用一般过去时态的被动语态，结构是was/were+动词的过去分词．主语是单数，因此用was．build的过去分词是built．by介词，这里的"被"的意思，后跟they的宾格them．last year去年，时间状语．答案是A new school was built by them last year．

点评 被动语态表示主语是动作的承受者，被动语态由"be动词+及物动词的过去分词"构成，be动词的单复数要与主语的单复数保持一致，还要注意时态及过去分词的变法．