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1、这是个词组吧：turn on过去式和过去分词都是：turned onturn是动词。 2、而且不是特殊的。 3、所以加ed就行了。...

turn 的过去式是turned 例句如下，请仔细体会和理解吧 1. As soon as he turned his back, she would make her escape. 他一转身......