“我还以为`````”英语要怎么表达？

我还以为。
英语是：I also think that。

解释：
also 英[ˈɔ:lsəʊ] 美[ˈɔ:lsoʊ]
adv. 也; 同样; 并且;
conj. 另外;
[例句]It is the work of Ivor Roberts-Jones, who also produced the statue of Churchill in Parliament Square
这是艾弗·罗伯茨-琼斯的作品，他还创作了议会广场上的丘吉尔塑像。

think 英[θɪŋk] 美[θɪŋk]
vt. 想; 以为; 思索; 看待;
vi. 考虑; 思辩; 构想; 回忆;
adj. 深思的; 供思考的;
[例句]I certainly think there should be a ban on tobacco advertising
我确实认为应该禁止香烟广告。

时态的问题
表示的意思是 自己原来以为,但经过某些原因知道自己的想法不对,事情并不是自己想的那样
所以 是过去是那样认为的
应该为过去时
直接用 I thought......

我还以为是：I thought. . .
我还以为他是个老师呢：I still think he is a teacher?
我还以为他是北京人呢：I still think he is the city?

I thought he was a teacher.

I'd thought he was from Beijing.

I thought he was a teacher (but now I KNOW that he isn't).