1. I had forgotten all about the snails when Robert suddenly said that I must stay to dinner.
    我把蜗牛的事已忘得一干二净，罗伯特突然提出一定要我留下来吃晚饭，这才提醒了我。

2. I apologized. "I had forgotten," I said, "that I had put them in."
    我表示抱歉。"我忘记了，" 我说，"我把它们也放进去了。"