to think

• 以为自己很不错

  be big-headed

• 你以为怎样？

  what did you think?

• 我以为他是对的。

  I thought he was right.

• 大家都以为不能这么办。

  Everyone thought that it couldn't be done like that.

• 我不懂，为什么他以为不会有人反对。

  I don't understand how he could think that no one would be against this.

• 原来是你，我还以为是周同志呢。

  Oh, it's you. I thought it was Comrade Zhou.