How can I know?

我怎么会知道呢？

《新英汉大辞典》

How can I know that the letter is for you?

我怎么知道这封信是你的？

youdao

But Abram said, "o Sovereign Lord, how can I know that I will gain possession of it?"

亚伯兰说：“主耶和华啊，我怎能知道必得这地为业呢？”

youdao

"I was one of these teenagers, and so I know how difficult it can be to break this habit when it's been with you for a long time,".

VOA: standard.2009.06.22

So I mean philosophy can talk about how do we know we got a table here between us. Right?

比如，哲学可以告诉我们是怎么感知到,我们之间有一个桌子，对不对？

普林斯顿公开课 - 人性课程节选

Let's look at a few examples of how we can use the "I don't know" pattern.

下面我们来看几个例子，看看该如何使用这个句型。

I don't know 课堂 - SpeakingMax英语口语达人

Now, I don't know how clearly I can say this, but let me try to repeat it.

NPR: Obama Pitches Health Care Overhaul In Wisconsin

"I don't even know if I can describe how meaningful it is, " Johnson said.

WSJ: Cyclocross: The Other (Cooler) Super Bowl��Jason Gay

They want to know: How can I make my customers happy and bolster our brand?

FORBES: Why Social Media Is One Of The Best Ways To Keep Your Customers Happy