题目内容
15．Before I got home yesterday，my robothad bent （bend） its body．分析 昨天我到家之前，我的机器人已经弯曲了它的身体．
解答 答案：had bent．
根据Before I got home yesterday，my robot--（bend） its body，可知昨天我到家之前，我的机器人已经弯曲了它的身体．句子中根据Before I got home yesterday可知昨天我到家是一个过去的时间，而机器人弯曲它的身体是发生在这个时间之前，所以句子应该用过去完成时，由had+动词的过去分词构成．故填had bent．
点评 本题考查用所给单词的适当形式填空，首先要根据语境明确句意，然后再根据相关语法对所给单词在形式上做出正确的变化．
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