thought = 除了是 think 的過去式, 也可以是「以為」
think = 想 / 覺得
例句:
- I think it is a good idea.
[我覺得這是個不錯的建議]
- I thought it was a good idea.
[我以為這是個不錯的建議 (結果不是)]
- I think he is at home.
[我想他在家]
- I thought he was at home.
[我以為他在家 (結果不是)]
* thought 就是你曾經有那個想法 [過去式], 結果 [現在式] 卻跟你想像中不一樣 (被事實否定了)
refer to http://tw.knowledge.yahoo.com/question/question?qid=1106081808672