Question

6．昨天他到机场时才意识到忘带身份证了．（when，arrive）
Yesterday when he arrived at the airport，he realized that he had forgotten to take his ID card with him．．

Answer 1

分析 Yesterday when he arrived at the airport，he realized that he had forgotten to take his ID card with him．

解答 答案：Yesterday when he arrived at the airport，he realized that he had forgotten to take his ID card with him．
表达的是昨天yesterday的事情用一般过去时，when引导的时间状语从句，arrive in/at到达，the airport是小地点，故用at，故Yesterday when he arrived at the airport，意识到realize，后加that引导的宾语从句，主句he realized that，从句的动作忘记forget发生在过去的过去，故用过去完成时had+过去分词，forget的过去分词forgotten，forget to do sth 忘记去做某事，ID card身份证，随身带上take sth with sb，故答案是Yesterday when he arrived at the airport，he realized that he had forgotten to take his ID card with him．

点评 过去完成时（The Past Perfect Tense）：表示过去某一时间或动作以前已经发生或完成了的动作对过去的某一点造成的某种影响或是结果，用来指在另一个过去行动之前就已经完成了的事件．它表示动作发生的时间是"过去的过去"，侧重事情的结果．