我知道怎么装子弹和使用枪支。

I knew how to load and handle a gun.

《柯林斯英汉双解大词典》

这个问题令她猝不及防，不知道怎么回答。

The question caught her completely off-guard and she did not know how to reply.

《柯林斯英汉双解大词典》

我知道怎么缝上扣子。

I know how to sew a button on.

《柯林斯英汉双解大词典》

He's narrating in great detail what happened while he was in the womb. Where does this knowledge come from?

他花了很大笔墨很详细地描写了,他还在子宫里发生的事，但他是怎么知道的呢？

耶鲁公开课 - 1945年后的美国小说课程节选

And you've asked several people on the street . "I just can't get there! I don't know where I'm going!" and

你在街边向几个行人问路。“我没法找到目的地了，我不知道该怎么走！”

How long课堂 - SpeakingMax英语口语达人

The Elder Brother is issuing this theory without any consideration, - obviously, whatsoever of earthly reality and we're shocked by -- I don't know how else to put it.

大哥没有经过任何思考就提出了这个理论，显然，尘世间的任何事实都让我们震惊了-,我不知道怎么去说。

耶鲁公开课 - 弥尔顿课程节选