题目内容
13．When did you borrow the book？（同义句转换）How long have youkept the book？
分析 --你什么时候借的这本书？
--你借这本书多久了？
解答 答案：How long； kept．考查同义句．"你什么时候借的这本书？"，可以表达为"你借这本书多久了？"．可以用现在完成时态代替．结构是have/has+动词的过去分词．borrow是非延续性动词，现在完成时态，要变为相应的延续性动作keep，过去分词是kept．现在完成时态中表示多长时间，用how long．答案是How long；kept．
点评 同义句转换最基本的是要保持原意不变，在理解语境的基础上，抓住关键单词或词组，运用相同词意的单词或词组完成试题．
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