翻译：约翰本来想找一个信封，但没想到读起了一些旧时的信件。
John original wants to find an envelope ，but sidetracked by reading some old letters.
参考翻译：John was looking for an envelope and got sidetracked reading some old letters.
造句：我本来想好好看书学习的，没想到看起了电影。
I want to study some books originally but sidetracked by watch movies.
动词：受到…干扰了
Where was I ？我刚讲到哪了
