I should think you are mistaken.

我倒是以为你搞错了。

youdao

"So I should think," said his mother.

“我想是的。”他的母亲说。

youdao

I should think it's going to rain soon.

我觉得很快就会下雨了。

《柯林斯英汉双解大词典》

That's what's wrong with you. You should be kissed,and often. And by someone who knows how'" "And I suppose you think you're the proper person."

VOA: special.2011.04.14

So this last version of the red light introduces interesting complications which I don't think should confuse us.

所以，关于红灯的这最后一个例子,让我们思考了平时不会思考的问题。

耶鲁公开课 - 文学理论导论课程节选

then I think absolutely plastic surgery can... maybe should be used if it's going to help with your self-confidence.

那么我觉得整形手术一定能……如果它能帮你增强自信，就应该整形。

关于整形手术 - SpeakingMax英语口语达人

It gained, I should think, a fair number of recruits and a great deal of prestige.

NEWYORKER: Politics and Prose

"I should think this is a one-off because I don't really know what else there will be to say, " he said.

BBC: Araucaria crossword setter gives cancer clue

At first I had no intention of replying to the note, but I told Ruthann and she said that I should think about writing back.

NEWYORKER: Gravel