“我还以为”怎么用英文表达？

可以作为参考：Hey,I received your email!!I never though that you would write to me...I though that you didn't remember me any more~
I'm satisfied with my marks at the end of this term!
How's everything going?

Take Care

我还以为：I thought...即可（英文最好不要按中文的意思直译）

You should reply my Email？I thought you ignore me and forget me!

I am very satisfied with the final exam,how are you doing recently？

it's unexceptable that you answer my Email,Iwas thought that you did not want to keep me out,I was thought that you have forget me!i was satisfied with my final examination,how's everything going?

我还以为这篇文章很长
i
thought
the
article
was
long
英
[ˈɑ:tikl]
美
[ˈɑrtɪkəl]
n.
（报章杂志中的）文章，论文;
条款;
物品;
[语]
冠词;
vt.
使受协议条款的约束;
以协议（或契约）约束;
订约将…收为学徒（或徒弟）;
定约雇用;
vi.
进行控告，提出罪状（或指责）(against);
签订协议;