语法总结
过去完成时交代先发生的动作
After I had had lunch... 和 I had left it... 都发生在 looked for 之前，使用 had + 过去分词。
相似句：
- After she had eaten, she went out.
- He had left the bag on the chair before he paid.
have 的不同用法
have lunch 是“吃午饭”的实义动词；have got 可表示“拥有”，不能机械替换所有 have。
相似句：
- We had dinner at seven.
- I have got a new bag.